Casino Glossary (A to Z)
Every casino, bonus, game and payment term you are likely to meet, explained in plain English and without the marketing spin.
Every hobby has its own language, and gambling has more than most. Between the maths on the games, the small print on the bonuses and the acronyms on the cashier, a newcomer can feel like they need a translator just to make a first deposit. This glossary is that translator. It gathers the terms you will actually run into and explains each one in a sentence or two of plain English, with no jargon smuggled into the definitions.
Use it however suits you. Skim the overview below to get your bearings, jump straight to a letter using the A to Z bar, or search the page for the exact word you are stuck on. Wherever a term has a full guide of its own, we point to it once, so you can dig deeper without the definitions turning into a wall of links.
How to use this glossary
- New here? Start with the six core terms below, then browse at your own pace.
- Looking for one word? Use the A to Z bar, or your browser's find function.
- Want more depth? A handful of terms link once to a full guide.
Most of the vocabulary sorts neatly into a few groups. Knowing which bucket a word belongs to often tells you roughly what it means before you even read the definition.
Two quick-reference tables round out the overview. The first decodes the acronyms that appear everywhere; the second cuts through the bonus small print, which is where most confusion, and most complaints, begin.
| Abbreviation | Stands for | What it means |
|---|---|---|
| RTP | Return to player | Long-run payback percentage of a game |
| RNG | Random number generator | Software that makes outcomes random |
| KYC | Know your customer | Identity check before a payout |
| AML | Anti-money laundering | Rules against disguising illegal funds |
| VIP | Very important player | Loyalty tier with extra perks |
| T&Cs | Terms and conditions | The rules attached to an offer or account |
| Bonus term | What it means for you |
|---|---|
| Wagering requirement | How many times you must bet a bonus before cashing out |
| Game weighting | How much each game counts toward that wagering |
| Max bet | The biggest stake allowed while a bonus is active |
| Sticky bonus | Bonus funds you cannot withdraw, only winnings from them |
| Max cashout | A cap on the winnings you can keep from a bonus |
A
Aggregator: a company that bundles games from many studios into one platform, so a single casino can offer titles from dozens of providers through a single integration rather than dealing with each one separately.
Anti-money laundering (AML): the laws and checks that stop casinos being used to disguise the origin of illegal money. AML rules are the reason behind identity and, occasionally, source-of-funds requests.
Autoplay: a slot feature that spins a set number of times automatically at a fixed stake. Sensible versions let you set loss and single-win limits so the spins stop on their own.
B
Baccarat: a simple card game where you bet on the banker, the player or a tie. The banker bet carries one of the lowest house edges in the whole casino.
Bankroll: the total amount of money you have set aside for gambling. Managing it, and never topping it up on impulse, is the single most important habit for staying in control.
Bet (stake): the amount you risk on one spin, hand or round. Stake size, not just the game you pick, decides how long your bankroll lasts and how big the swings feel.
Bet limit: a cap on how much can be staked, either per bet or over a period. A player-set bet limit is a simple way to keep stakes sensible, while a bonus max bet is set by the casino.
Blackjack: a card game where you aim to beat the dealer to 21 without going over. Sound basic strategy makes it one of the highest-RTP games on the floor.
Bonus: a promotional offer such as a matched deposit, free spins or cashback. It looks like free money, but it almost always carries wagering requirements and other conditions.
Bonus buy: a slot feature that lets you pay an upfront multiple of your stake to jump straight into the bonus round. It raises both the cost and the volatility, and it is restricted in some markets.
Bonus code: a short code entered in the cashier or sign-up form to unlock a specific promotion. Forgetting to add it usually means forfeiting the offer, with no way to claim it later.
C
Cashback: a bonus that returns a set percentage of your net losses over a period. Check whether it arrives as real cash you can withdraw or as bonus funds with their own wagering.
Cashout (withdrawal): taking money out of your casino account. Because each request passes a verification and review step, a withdrawal takes longer than a deposit, especially your first one.
Cluster pays: a slot mechanic that awards wins for groups of matching symbols touching each other, rather than along fixed paylines. It usually pairs with tumbling reels, where winning symbols vanish and new ones drop in.
Comp points: loyalty points earned as you play that can be swapped for bonus credit, cash or perks. The exchange rate is usually modest, so treat them as a small extra rather than a reason to play on.
Cryptocurrency: digital currencies such as Bitcoin, Ethereum and stablecoins, used to deposit and withdraw at many casinos. Crypto payouts are often the fastest available, though coin prices can move between deposit and cashout.
D
Deposit: money you pay into your casino account to fund your play. Deposits are almost always instant, whatever the method, and are the point at which any deposit limit you have set takes effect.
Deposit match: a bonus that adds a percentage of your deposit as extra funds, such as a 100% match that doubles a 50 deposit to 100. The bonus portion carries wagering requirements before it can be withdrawn.
Demo mode: a free-play version of a game that uses virtual credits instead of real money. It is the safest way to learn how a title works and get a feel for its volatility before you stake anything.
E
e-Wallet: a digital payment service such as PayPal, Skrill or Neteller that holds funds and moves them between your bank and the casino. e-Wallets are popular because withdrawals to them are often among the fastest available.
Expanding wild: a wild symbol that stretches to fill a whole reel, covering extra positions and creating more winning combinations. It is a common feature in higher-volatility slots.
F
First deposit bonus: a welcome offer tied to the first payment you make, typically a deposit match, free spins, or both. Read the terms before claiming, as opting in can lock your funds to wagering rules.
Fixed jackpot: a top prize set at a fixed amount that does not grow with play, unlike a progressive. It pays the same whenever it lands, with the odds built into the game rather than a shared pool.
Free spins: spins on a slot that cost you nothing, given as a bonus or triggered inside a game. Bonus free spins usually carry wagering requirements and sometimes a cap on how much you can win from them.
G
Game weighting: the rate at which each game counts toward a wagering requirement. Slots usually count 100%, while table and live games often contribute 10% or less, so the game you choose changes how fast a bonus clears.
Gamble feature: an optional double-or-nothing round offered after a slot win, such as guessing a card colour. It is pure chance and adds volatility, so it is best skipped if you want to protect a win.
H
High roller: a player who stakes large amounts, often courted with tailored bonuses, higher limits and a dedicated account manager. The perks vary widely, so they are worth judging on the actual terms rather than the label.
Hit frequency: how often a slot lands any win at all, separate from how big those wins are. A high hit frequency feels busy with small returns, and often signals lower volatility.
House edge: the casino's built-in mathematical advantage on a game, expressed as the percentage of each bet it keeps over time. It is the mirror image of RTP, so a 96% RTP means a 4% house edge; our guide to how online casinos work shows where it sits.
I
iGaming: the umbrella term for online gambling as an industry, covering casinos, sports betting, poker and bingo. You will see it used on provider and operator sites rather than by players.
J
Jackpot: the top prize on a game. A fixed jackpot pays a set amount, while a progressive jackpot grows as players stake across a network until someone wins it and it resets.
K
KYC (know your customer): the identity check a licensed casino runs to confirm your age and identity before releasing a withdrawal. Completing it early, with valid ID and proof of address, avoids payout delays later.
L
Live dealer: a game streamed in real time from a studio with a human dealer and real cards, wheels or dice. It brings the feel of a physical casino table online, with betting handled by software.
Loss limit: a responsible-gambling tool that stops play once your net loss reaches a figure you set in advance. It is one of the simplest ways to keep a session from getting away from you.
M
Max bet: the largest stake allowed while a bonus is active, often 5 or so. Breaching it can void your bonus and any winnings, so it is one of the most important bonus rules to check.
Max cashout: a cap on the amount of winnings you can keep from a bonus, common on no-deposit and free-spin offers. Anything above the cap is removed when you withdraw.
Megaways: a slot mechanic that changes the number of symbols on each reel every spin, creating thousands of ways to win. Megaways titles tend to be high in volatility.
Minimum deposit: the smallest payment a casino will accept, often around 10 to 20. It usually also sets the floor for qualifying for a welcome bonus, so it is worth checking before you claim an offer.
Multiplier: a feature that increases a win by a set factor, such as x2 or x3. Multipliers appear on wild symbols, in free-spin rounds and on bonus features, and they drive many of a slot's biggest payouts.
N
No-deposit bonus: a small reward, such as a few free spins or a little bonus cash, given without asking you to deposit first. It usually carries strict wagering requirements and a low maximum cashout.
O
Odds: the likelihood of an outcome, and the payout attached to it. In casino games the odds are set so the house keeps its edge over the long run, however a single round turns out.
P
Pay N Play: a cashier system, built on open banking, that lets you deposit straight from your bank and play within minutes, often with registration and verification handled automatically in the background.
Payline: a line across the reels along which matching symbols must land to pay. Games range from a single payline to hundreds, while Megaways and cluster titles swap fixed lines for thousands of ways to win.
Payout: the money a game returns on a winning bet, or more broadly the money a casino pays out to players. Payout speed depends far more on a casino's internal review than on the payment method itself.
Paytable: the panel that shows a game's symbol values, features and rules, and usually its RTP. Checking it before you play tells you how a title pays and what the top win looks like.
Pending: the status of a withdrawal while the casino reviews it, before the payment is sent. Clearing verification and any bonus in advance keeps the pending stage as short as possible.
Progressive jackpot: a jackpot that grows with every stake placed across a network of players until one lucky spin wins the pooled total, which then resets to a seed amount.
Provider (studio): the developer that builds a game, such as Pragmatic Play, Evolution or NetEnt. Casinos license titles from providers rather than making their own, which is why the same game appears across many sites.
Q
Quickspin: a slot setting that speeds up the spin animation so rounds finish faster. It changes only the pace of play, never the odds, so treat it as a comfort feature and mind how quickly it burns through a bankroll.
R
Reality check: a pop-up reminder that shows how long you have been playing and how much you have staked. It is a gentle responsible-gambling nudge, best set for every 30 or 60 minutes.
Reel: one of the vertical strips of symbols that spin on a slot. Most video slots use five reels, and the number of reels and rows together sets how many symbols are in play on each spin.
Reload bonus: a bonus on a deposit you make after your first, designed to reward returning players. Reloads are usually smaller than a welcome offer but appear regularly, often on set days of the week.
RNG (random number generator): the certified software that produces unpredictable, unbiased outcomes in a digital game. Independent labs test it to confirm results are genuinely random.
RTP (return to player): the percentage of all wagers a game is designed to pay back over the long run. A 96% RTP returns about 96 per 100 staked across millions of rounds; our RTP and volatility guide explains it in full.
S
Scatter: a slot symbol that pays or triggers a feature wherever it lands, without needing to line up on a payline. Landing enough scatters often unlocks free spins or a bonus round.
Self-exclusion: a tool that blocks your access to gambling for a set period, either at one casino or, through a national scheme, across every licensed operator at once. See our responsible-gambling guide for how it works.
Slot: the most popular casino game, where symbols spin on reels and matching combinations pay. Slots run from simple three-reel classics to feature-packed video slots with free spins, wilds and bonus rounds.
Source of funds: evidence, such as a payslip or bank statement, that a casino may request to confirm where larger deposits come from. It is a standard anti-money-laundering step rather than a sign of suspicion.
Sticky bonus: bonus funds you can play with but never withdraw; only the winnings they produce are yours to keep. The bonus itself is removed when you cash out.
T
Terms and conditions (T&Cs): the rules attached to a bonus or account. With bonuses they set the wagering, time limits, eligible games and maximum cashout, so they are always worth a read before opting in.
Time-out: a short cooling-off period, from 24 hours up to several weeks, that locks your account and then quietly restores it. It is ideal for breaking a run of impulsive sessions.
Tournament: a promotion where players compete on a leaderboard, ranked by points from wins, spins or stakes over a set period, with a prize pool shared among the top finishers. Check whether entry needs real-money play.
Turnover: the total amount wagered over a period, counting every stake including re-bet winnings. Wagering requirements are measured against turnover, not your deposit, which is why they add up faster than expected.
U
Unlicensed casino: a site operating without a recognised regulator's licence. Playing at one means no guaranteed fair games, no protection for your funds and no complaints route, so it is best avoided.
V
Verification: the process of confirming your identity and details, part of KYC, before a casino releases a payout. Uploading clear documents when you register, rather than at cashout, is the best way to avoid delays.
VIP programme: a loyalty scheme that rewards regular players with perks such as faster withdrawals, a personal manager and tailored bonuses. The value varies widely, so judge it on the terms, not the name.
Volatility (variance): how a game distributes its returns; low means frequent small wins, high means rare large ones. It does not change the RTP, only how bumpy the ride to it feels.
Voucher (prepaid): a prepaid method such as Paysafecard that lets you deposit a fixed amount with no bank details. Vouchers are handy for budgeting, but you usually cannot withdraw back to them, so you need a second method for payouts.
W
Wagering requirement: how many times you must bet a bonus before you can withdraw winnings from it. A 100 bonus with 35x wagering means 3,500 in bets; game weighting decides how fast that clears.
Welcome bonus: the introductory offer for new players, often spread across the first few deposits as matched funds and free spins. Generous headline figures usually come with steeper wagering.
Wild: a slot symbol that substitutes for most others to help complete winning combinations. Variants include expanding, sticky and multiplier wilds, each changing how the payout works.