Casino terminology is easier to learn when it is grouped by what you are trying to do. Account and licence terms explain who you are dealing with; game terms describe how a wager is resolved; maths terms describe long-run probabilities; payment and bonus terms affect access to money; safer-gambling terms describe controls. This glossary follows that journey instead of listing disconnected definitions from A to Z.
Key takeaways
- RTP and house edge are long-run mathematical concepts, not predictions for the next bet.
- A “pending” withdrawal is not the same stage as bank settlement.
- KYC is an identity process; source-of-funds checks are a different, more specific request.
- Bonus balance, cash balance and withdrawable balance can have different rules.
- Self-exclusion is a formal stop-gambling measure, not simply a marketing preference.
Account, operator and licence terms
Operator is the business that offers the gambling service to customers. Brand is the public-facing name; one operator can run several brands. Domain is the website address and should match the regulator’s records in markets such as Great Britain. Operating licence is regulatory authorisation for specified gambling activities. Regulator is the public authority that licenses or supervises gambling under a jurisdiction’s law.
Account is your customer record containing identity information, balances and transaction history. KYC (“know your customer”) is the process used to confirm identity and age and to meet related legal duties. Source of funds means evidence about where money used for gambling came from; it can be requested where risk or legal obligations require more information. KYC explained covers the distinctions.
Money and balance terms
Deposit is money paid into the gambling account. Withdrawal is a request to transfer eligible money out. Cash balance usually means money not restricted as bonus credit, while bonus balance refers to promotional funds governed by offer terms. Withdrawable balance is the amount the account currently allows to be requested for payout; the exact composition depends on the operator’s terms and any unresolved verification or promotion.
Pending normally describes a withdrawal request received by the operator but not yet fully released. Processing can describe internal or payment-provider handling. Settlement or crediting is the later stage when the bank, card scheme, e-wallet or other provider posts funds to the receiving account. withdrawal stages explains why one time estimate cannot cover every stage.
Core probability and value terms
House edge is the casino’s theoretical average advantage on a wager under defined rules. A 2% house edge does not mean every £100 session loses exactly £2; it describes an expectation over many comparable bets. RTP, or return to player, expresses the theoretical long-run proportion of stakes returned as winnings under a game model. For a simple fixed game, RTP and house edge can sometimes be described as complements, but the way they are published and measured varies by product.
Variance describes how widely results can spread around an average. Volatility is commonly used in slots to describe the pattern of prize frequency and size. Read the dedicated RTP guide and volatility guide for the full explanations.
Slot terms
Reel is a vertical strip of symbols, physical or simulated. Payline is a defined line or pattern on which symbol combinations are evaluated in traditional line-based slots; some modern games use other win systems. Ways to win usually means wins are evaluated across symbol positions rather than fixed paylines, according to the game’s rules.
Wild is a symbol that may substitute for specified symbols. Scatter usually triggers or pays according to rules that are not limited to a standard payline. Free spins are game rounds awarded by a feature or promotion; they are not necessarily free of conditions when issued as a casino promotion. Bonus feature is an additional game state such as free spins, a pick feature or multiplier round. how slots work explains the mechanics.
Table-game terms
In blackjack, a hit requests another card, stand ends your drawing, double down increases the stake under the table rules and normally gives one final card, and split separates an eligible pair into two hands. A soft hand contains an ace currently counted as 11 without busting. Basic strategy is a mathematically derived decision framework for a specified rule set; it does not remove the house edge.
In roulette, an inside bet covers one or a small group of numbers, while an outside bet covers larger groups such as red/black or odd/even. In baccarat, Player, Banker and Tie are names of betting positions, not descriptions of who is physically playing the cards.
Bonus and promotion terms
Deposit match means bonus credit is calculated as a percentage of a qualifying deposit up to a stated cap. Wagering requirement is a turnover condition that may require eligible stakes before certain bonus-related funds can be withdrawn. Game contribution tells you how much play on a game counts towards that requirement. Maximum bet is a promotional rule that can restrict stake size while bonus conditions apply.
Free spins in promotional terms can carry a fixed spin value, eligible-game restriction, expiry and rules for what happens to resulting winnings. Promotional credit may be non-withdrawable itself even when resulting winnings can become withdrawable under the terms. See the existing wagering requirements guide for the calculation logic.
Safety and responsible-gambling terms
Deposit limit restricts how much can be added to the account over a defined period. Loss limit restricts loss according to the operator’s stated calculation. Time-out temporarily blocks gambling access for a chosen period. Self-exclusion is a formal arrangement intended for someone who wants to stop gambling; multi-operator schemes can extend that block across participating or licensed operators depending on the jurisdiction.
Gambling harm is broader than financial loss. It can include effects on mental health, relationships, work and wellbeing. Chasing losses means increasing or continuing gambling in an attempt to recover money already lost, a behaviour associated with gambling harm.
Disputes and complaints terms
A complaint is a formal expression that you are dissatisfied with an operator’s service or decision. A dispute is a complaint about the outcome of a gambling transaction or related contractual issue that remains unresolved. ADR means Alternative Dispute Resolution: an independent route that can consider eligible disputes after the operator’s process reaches the required point.
A deadlock letter records that the operator and customer have reached a final position before the maximum internal complaint period. In Great Britain, the Gambling Commission regulates operators but does not decide individual gambling transaction disputes for customers. what to do if a casino does not pay gives the evidence and escalation sequence.
FAQ
What is the difference between RTP and house edge?
Both describe long-run mathematical expectation from different directions, but how they are calculated and presented depends on the game. Neither predicts a single session.
What does KYC mean at a casino?
Know Your Customer. It is the identity and age verification process and can be connected to other regulatory checks.
What does pending withdrawal mean?
It usually means the operator has received the request but has not fully released it. It does not describe the later bank or payment-provider settlement stage.
Are free spins always free?
Not necessarily in the everyday sense. Promotional free spins can have expiry, eligible-game, wagering or winnings restrictions.
What is a soft 17 in blackjack?
A hand totalling 17 with an ace counted as 11, such as ace-six. Whether the dealer hits or stands on soft 17 is a rule variation that can affect the house edge.
What is self-exclusion?
A formal tool for someone who wants to stop gambling. The exact period and scope depend on the scheme and jurisdiction.
Conclusion
The most useful casino vocabulary is the language that helps you make a decision: who operates the site, what the game rules mean, how the maths should be interpreted, what happens to your money and what controls exist if you want to stop. When a term affects money, verification or legal rights, use the operator’s rules and regulator guidance rather than relying on shorthand definitions alone.
Sources
- UK Gambling Commission — KYC and verification terminology
- UK Gambling Commission — withdrawal terminology and rights
- UK Gambling Commission — ADR and deadlock context
- UK Gambling Commission — self-exclusion terminology
- UK Gambling Commission — bonus and terms context
- Wizard of Odds — house-edge definition and game maths reference
How this page was prepared
Reviewed by HolySlots Editorial Team. Claims, terminology, and time-sensitive details were checked against the sources listed below and the page was last updated September 15, 2026.
AI-assisted tools supported research organization or drafting; editorial review remained responsible for source selection and the published conclusions.