Getting Started
D&D Terms Explained - The Glossary Nobody Hands You
D&D's vocabulary sounds like a wall from outside and takes about three sessions to absorb from inside. This is the cheat sheet for the meantime: the terms you'll actually hear at a real table, defined in one breath each, with the cultural baggage included (because "min-maxing" is a definition and a light accusation, and you deserve to know both halves).
The dice and the rolls
- d20, d6, dX: dice by side count. The d20 is the star; the full cast is here.
- Nat 20 / nat 1: the die itself showing 20 or 1, before modifiers. Cheering and groaning respectively are mandatory. "Natural" means the raw die, not the total.
- Advantage / disadvantage: roll two d20s, keep the better (or worse). The engine of half of 5e's rules.
- Modifier: the number your sheet adds to a roll. When the GM says "roll Perception," they mean d20 plus that.
- DC (Difficulty Class): the target number to beat. "DC 15" is the GM telling you the bar.
- AC (Armor Class): the DC for hitting a creature. Your armor's whole job.
- Crit: a critical hit (usually a nat 20 on an attack); doubles damage dice and produces the table's loudest moment.
The people and the roles
- GM / DM: Game Master / Dungeon Master; same job, and D&D says DM. The referee, narrator, and every character you meet. Also hireable.
- PC / NPC: player character (yours) versus non-player character (the GM's thousands).
- The party: the PCs collectively. Yes, even the loner the character guide warned about.
- Murderhobo: a PC who solves everything with violence and owns no furniture. Said with a sigh.
- Rules lawyer: the player who litigates rulings mid-scene. The polite fix is rulings now, rules later.
The play styles and formats
- One-shot / campaign: one evening versus a series; the full comparison exists.
- Session zero: the pre-campaign expectations meeting. Checklist here.
- Theater of the mind: combat narrated without a map or grid, all imagination.
- Homebrew: anything invented rather than published, from one custom monster to an entire world. A compliment or a warning label depending on the GM.
- West marches / living campaign: shared-world formats where many players rotate through one persistent setting. Explained properly here.
- TPK (Total Party Kill): everyone dies. Rare, memorable, and discussed for years.
The character-building argot
- Build: a character's mechanical plan. "A grappler build" means the choices all serve grabbing people.
- Min-maxing: optimizing hard (minimize weaknesses, maximize strengths). Neutral term for a playstyle; mild side-eye when it outruns the fun.
- Dump stat: the ability score you sacrificed. The barbarian's Intelligence, the wizard's Strength, and everyone's favorite running joke.
- Squishy: low hit points. Wizards are squishy. Stand behind the fighter.
- Buff / nerf / debuff: make stronger, make weaker (by rules change), and weaken in-game with a spell, respectively.
- Roll for initiative: the phrase that means combat is starting and someone's plan just failed. A tiny adrenaline dispenser.
That's the whole survival kit; anything else, ask at the table, since decoding jargon aloud is a beloved pastime and nobody expects fluency from a new player anyway. The vocabulary installs itself the fun way: one nat 20, one squishy wizard, one near-TPK at a time.
Frequently asked questions
What does TPK mean in D&D?
Total Party Kill: an encounter that wipes out every player character. It's rare, usually the product of stacked bad luck and bold choices, and it becomes the story the group tells forever, which is its own kind of victory.
What's the difference between a nat 20 and a crit?
A nat 20 is the physical die showing 20; on attack rolls it's also a critical hit (doubled damage dice). On checks and saves, a nat 20 is just an excellent roll; the "crit" label technically belongs to attacks.
What does min-maxing mean, and is it bad?
Building a character for maximum mechanical strength and minimal weakness. It's a legitimate playstyle, not a crime; it earns friction only when optimization starts overruling the table's fun or the story's logic.
What does homebrew mean in D&D?
Any content the GM or players created instead of using published material: house rules, custom monsters, whole settings. Most tables run at least a little; the term covers everything from one tweaked spell to an original world.
What is theater of the mind?
Running combat and scenes purely through description, no battle map or miniatures. It's faster and more cinematic; grids are more tactical. Many tables switch between both depending on the fight.