Online Casino Glossary
Plain-language definitions for terms US players see on review pages, bonus pages, state guides, and responsible-gaming resources.
These definitions are editorial shortcuts, not operator rules or legal advice. Terms can be used a bit differently across casinos, sweepstakes sites, and state regulators, so treat this page as a starting point and check the linked guide or state page when the wording affects a real decision.
How To Use This Glossary
Use the glossary to decode terms, not to replace page-level caveats.
These definitions explain the vocabulary that shows up across reviews and guides. They do not override the exact rules, restrictions, or evidence notes shown on the page you are reading.
- • Use glossary entries to understand terms like KYC, RTP, Sweeps Coins, and volatility.
- • Check review pages and state pages for the current context that definitions alone cannot cover.
- • This glossary is editorial guidance, not legal advice or proof of site-level policy.
A
- AMOE (Any Method of Entry)
- A legal requirement for sweepstakes promotions. Allows participation without purchase via mail-in, social media, or other free methods. Required for sweepstakes casinos to comply with US promotional sweepstakes law.
- AML (Anti-Money Laundering)
- Regulatory compliance programs that casinos use to detect and prevent use of gambling accounts to launder money. Triggers additional KYC checks for large transactions.
B
- Bankroll
- The total amount of money a player has set aside for gambling. Proper bankroll management means risking only a small percentage per session to extend play time.
- Bitcoin Casino
- An online casino that accepts Bitcoin (BTC) as a primary deposit and withdrawal method, often alongside other cryptocurrencies.
- Bonus Abuse
- Exploiting casino bonuses in ways that violate terms of service, such as using multiple accounts to claim welcome offers repeatedly. Casinos can void winnings and ban accounts for this.
C
- Cashback Bonus
- A promotional offer that refunds a percentage of losses (typically 5-20%) over a defined period. Less common at sweepstakes casinos than at real-money platforms.
- Cold Wallet
- An offline cryptocurrency wallet not connected to the internet. Used by reputable crypto casinos to store most player funds securely away from hacking attempts.
- Cooling-Off Period
- A temporary account suspension set by the player via responsible gambling tools. Typically 24 hours to several weeks. Used to take a break without permanent self-exclusion.
- Crypto Casino
- An online gambling platform that primarily or exclusively accepts cryptocurrency for deposits and withdrawals, often with provably fair game verification.
D
- Deposit Bonus
- A promotional offer matching a percentage of a player's deposit up to a maximum amount. Almost always comes with wagering requirements that must be met before withdrawing.
- Dispatchable Winnings
- Casino winnings available for withdrawal after all wagering requirements and verification conditions have been met.
- Double Up
- A game feature allowing players to risk their winnings on a 50/50 proposition to double the payout. Has a house edge equal to the base game in most implementations.
E
- eKYC
- Electronic Know Your Customer verification. Automated identity checks using document scanning and facial recognition, reducing verification time from days to minutes.
F
- Free Spins
- Bonus casino spins on slot games awarded without deducting from the player's balance. Almost always come with wagering requirements on winnings generated.
G
- GC (Gold Coins)
- The non-redeemable virtual currency used at sweepstakes casinos. Can be purchased or received free. Has no cash value and cannot be redeemed for prizes.
H
- House Edge
- The mathematical advantage the casino has over players, expressed as a percentage. A 4% house edge means the casino keeps $4 per $100 wagered on average over time.
K
- KYC (Know Your Customer)
- Identity verification many casinos require before withdrawals or account changes. Usually involves submitting government ID and proof of address.
L
- Live Dealer
- Casino games streamed in real-time with a human dealer. Cards or roulette wheels are physically present; players interact via live video and chat interface.
- Loyalty Program
- A tiered rewards system that gives players points for wagering, redeemable for bonuses, cashback, or prizes. Higher tiers offer better rates and exclusive perks.
M
- Maximum Bet
- The highest allowed single wager on a game or while using bonus funds. Exceeding maximum bet limits while a bonus is active can void winnings.
- Mystery Box
- A gambling format where players pay to open randomized boxes containing items of varying values (often gaming skins or digital goods). Popular with CS2 and gaming audiences.
N
- No-Deposit Bonus
- Bonus funds or free spins awarded to new players without requiring a deposit. Typically small and carries high wagering requirements to limit abuse.
P
- Payline
- A line across a slot machine's reels along which matching symbols must land to form a winning combination. Modern slots can have hundreds of paylines or pay-anywhere mechanics.
- Payout Percentage
- See RTP (Return to Player). The percentage of wagered money a game is expected to return to players over time.
- Playthrough
- See Wagering Requirements. The total amount that must be bet before bonus funds become withdrawable.
- Progressive Jackpot
- A jackpot that grows with each bet placed on the linked game until a player wins. Can reach millions at networked progressive slots across multiple casinos.
- Provably Fair
- A cryptographic system allowing players to verify that casino game outcomes were not manipulated after the fact. Uses cryptographic hash functions and publicly verifiable seeds.
R
- RNG (Random Number Generator)
- Software that generates unpredictable numbers to determine game outcomes. Certified RNGs are tested by independent labs to ensure genuine randomness.
- RTP (Return to Player)
- The percentage of total bets a game pays back to players over millions of rounds. A 96% RTP slot returns $96 per $100 wagered on average. The house edge is 100% minus RTP.
S
- SC (Sweeps Coins)
- The prize-entry currency used at sweepstakes casinos. Players may receive it through AMOE methods or alongside Gold Coin purchases, then redeem eligible winnings under the site's rules.
- Self-Exclusion
- A voluntary process to block yourself from a casino or all casinos in a jurisdiction. Casinos are required to enforce exclusions once enrolled. Available via responsible gambling tools.
- Session Limit
- A responsible gambling tool that limits the duration of a single gambling session. The platform logs you out or shows a warning after the set time expires.
- Slot Variance
- Also called volatility. High variance slots pay less frequently but award larger amounts when they hit. Low variance slots pay more frequently with smaller wins. Neither has a universally better RTP.
- Sticky Bonus
- A bonus that cannot be withdrawn — only winnings generated from it can be cashed out. Contrasts with cashable bonuses where the original bonus amount can be withdrawn after playthrough.
- Sweepstakes Casino
- An online gaming platform that uses a dual-currency sweepstakes model with Gold Coins and Sweeps Coins instead of a standard real-money casino model. Availability and legal treatment vary by state.
U
- UIGEA
- The Unlawful Internet Gambling Enforcement Act (2006). US law that prohibits banks from processing transactions for illegal internet gambling — targets banks, not individual players.
V
- VIP Program
- A high-tier loyalty program at online casinos offering exclusive bonuses, higher withdrawal limits, personal account managers, and events for high-volume players.
- Volatility
- See Slot Variance. Describes the frequency and size of a game's payouts. High volatility = less frequent, larger wins. Low volatility = more frequent, smaller wins.
W
- Wagering Requirement
- The number of times a bonus must be wagered before associated winnings can be withdrawn. A 30x requirement on a $100 bonus = $3,000 in total bets required.
- Welcome Bonus
- A promotional offer for new players at account opening. Typically a deposit match percentage with a maximum cap, accompanied by wagering requirements.
- Withdrawal Limit
- The maximum amount a player can withdraw per day, week, or month. VIP accounts often have higher limits. Low withdrawal limits are a red flag at newer platforms.
Use This With
How We Rate Casinos
See how definitions like payout speed, mobile UX, and trust fit into our scoring framework.
State Legality Guides
Check state-specific legality, regulator links, and complaint/help resources before you sign up.
Responsible Gaming
Pair the glossary with practical tools for limits, self-exclusion, and gambling-support contacts.
Next Reads
How Online Casinos Work
RNG, house edge, and RTP explained in depth.
Wagering Requirements Explained
What 30x means and how to evaluate bonus value.
Casino Payment Methods
Crypto, e-wallets, cards — speeds and fees compared.
How to Choose a Crypto Casino
Licensing, provably fair, withdrawal speed — what to check first.