Slot terminology
Slots glossary: slot terms explained, from RTP to Megaways
A plain-English slots glossary. Every entry keeps the slot terms short and useful — what is RTP in slots, slot volatility explained, paylines explained and Megaways explained — so the jargon stops getting in the way. Use this slot terminology alongside the RTP database.
Slot terms explained, from A to Z
This slots glossary defines the slot terms you meet most often, in plain words. Each entry is short on purpose, so a quick question like what is RTP in slots takes seconds to answer rather than a search of its own.
- RTP (Return to Player)
- The long-run percentage of all wagered money a slot is programmed to pay back — a 96% RTP slot returns $96 for every $100 staked on average over millions of spins. It is a theoretical figure, not a promise for any single session.
- Volatility (Variance)
- How a slot distributes its wins. Low-volatility slots pay small amounts often; high-volatility slots pay rarely but larger. Two games with the same RTP can feel completely different because of volatility.
- Paylines
- The lines across the reels on which matching symbols must land to form a win. Classic slots have a single line; modern video slots can have 10, 25, 243 or more ways to win.
- Megaways
- A reel mechanic licensed from Big Time Gaming where the number of symbols per reel changes each spin, producing up to 117,649 ways to win. Megaways slots are usually high volatility.
- Wild
- A symbol that substitutes for other paying symbols to help complete a winning combination. Some wilds also expand, stack or multiply wins.
- Scatter
- A symbol that pays or triggers a feature (often free spins) regardless of where it lands on the reels, rather than on a payline.
- Bonus round
- A separate feature — a pick-me game, wheel or second screen — triggered by special symbols, usually offering the biggest wins in the game.
- Free spins
- Spins awarded by a feature (commonly three or more scatters) that cost nothing to play, often with extra multipliers or wilds attached.
- Hit frequency
- How often a spin produces any win, expressed as a percentage. A 25% hit frequency means roughly one in four spins returns something — independent of how large that win is.
- Reels
- The vertical columns that spin. Most video slots use five reels; classic slots use three. The symbols that land across the reels decide the outcome.
- Cluster pays
- A win mechanic where matching symbols pay when they touch in a group (a cluster) rather than along fixed paylines — common in grid-style slots.
- Progressive jackpot
- A prize pool that grows with every bet placed across a network of games until someone wins it. Progressive slots often have a lower base RTP because part of each stake feeds the jackpot.
- Max win
- The capped maximum a slot can pay on a single game round, expressed as a multiple of the stake — for example 5,000x or 50,000x your bet.
- Autoplay
- A setting that spins the reels automatically for a chosen number of rounds. Responsible-gambling rules in several markets require loss and time limits on autoplay.
Why RTP and the other slot terms matter
Understanding slot terms changes how you play. Knowing the RTP meaning, having slot volatility explained and seeing paylines explained lets you read any game honestly — which is exactly what the rest of this site is built to help you do.
The two entries that do the most work are RTP and volatility. Return to player tells you how much of every stake a game hands back over the long run, and volatility tells you how bumpy the ride to that average will be. Read together, they explain almost everything about how a slot feels: a high-RTP, low-volatility game stretches a budget with frequent small wins, while a high-volatility title can swing hard in both directions around the same payout. Once those two slot terms are clear, most of the rest of this slot terminology — paylines, hit frequency, wilds and scatters — is just detail about how individual wins are put together.
How to use this slots glossary
Keep this page open as a reference rather than reading it end to end. When a game’s help screen throws a term at you — Megaways explained here, a cascading reel, a buy-feature — jump to the entry, read the two lines, and carry on. Every definition is written to answer a single question like what is RTP in slots without sending you off on another search, and each links back to the tools where the term actually matters, so the jargon stays in service of playing rather than getting in the way of it.