# Rules Glossary *Source: Player's Handbook (2024), p. 360* ## Glossary Conventions The glossary uses the following conventions: - **Tags in Brackets.** Some entries have a tag in brackets after the entry's name, as in "Attack [Action]." A tag—Action, Area of Effect, Attitude, Condition, or Hazard—indicates that a rule is part of a family of rules. The tags also have glossary entries. - **"You.** " The game's rules—in this glossary and elsewhere—often talk about something happening to you in the game world. That "you" refers to the creature or object that the rule applies to in a particular moment of play. For example, the "you" in the [Prone](Mechanics/CLI/rules/conditions.md#Prone) condition is a creature that currently has that condition. - **"See Also.** " Some glossary entries include a See also section that points to other entries in the glossary, to chapters in this book, or both. - **No Obsolete Terms.** The glossary contains definitions of current rules terms only. If you're looking for a term from an earlier version of the fifth edition rules, consult the index. - **Abbreviations.** The abbreviations listed below appear in this glossary and elsewhere in the rules.   ## Rules Definitions Here are definitions of various rules. > [!embed-variantrule]- Ability Check >  > [!embed-variantrule]- Ability Score and Modifier >  > [!embed-variantrule]- Action >  > [!embed-variantrule]- Advantage >  > [!embed-variantrule]- Adventure >  > [!embed-variantrule]- Alignment >  > [!embed-variantrule]- Ally >  > [!embed-variantrule]- Area of Effect >  > [!embed-variantrule]- Armor Class >  > [!embed-variantrule]- Armor Training >  > [!embed-action]- Attack >  > [!embed-variantrule]- Attack Roll >  > [!embed-variantrule]- Attitude >  > [!embed-variantrule]- Attunement >  > [!embed-condition]- Blinded >  > [!embed-sense]- Blindsight >  > [!embed-variantrule]- Bloodied >  > [!embed-variantrule]- Bonus Action >  > [!embed-variantrule]- Breaking Objects >  > [!embed-variantrule]- Bright Light >  > [!embed-hazard]- Burning >  > [!embed-variantrule]- Burrow Speed >  > [!embed-variantrule]- Campaign >  > [!embed-variantrule]- Cantrip >  > [!embed-variantrule]- Carrying Capacity >  > [!embed-variantrule]- Challenge Rating >  > [!embed-variantrule]- Character Sheet >  > [!embed-condition]- Charmed >  > [!embed-variantrule]- Climbing >  > [!embed-variantrule]- Climb Speed >  > [!embed-status]- Concentration >  > [!embed-variantrule]- Condition >  > [!embed-variantrule]- Cone [Area of Effect] >  > [!embed-variantrule]- Cover >  > [!embed-variantrule]- Crawling >  > [!embed-variantrule]- Creature >  > [!embed-variantrule]- Creature Type >  > [!embed-variantrule]- Critical Hit >  > [!embed-variantrule]- Cube [Area of Effect] >  > [!embed-variantrule]- Curses >  > [!embed-variantrule]- Cylinder [Area of Effect] >  > [!embed-variantrule]- D20 Test >  > [!embed-variantrule]- Damage >  > [!embed-variantrule]- Damage Roll >  > [!embed-variantrule]- Damage Threshold >  > [!embed-variantrule]- Damage Types >  > [!embed-variantrule]- Darkness >  > [!embed-sense]- Darkvision >  > [!embed-action]- Dash >  > [!embed-variantrule]- Dead >  > [!embed-condition]- Deafened >  > [!embed-variantrule]- Death Saving Throw >  > [!embed-hazard]- Dehydration >  > [!embed-variantrule]- Difficult Terrain >  > [!embed-variantrule]- Difficulty Class >  > [!embed-variantrule]- Dim Light >  > [!embed-variantrule]- Disadvantage >  > [!embed-action]- Disengage >  > [!embed-action]- Dodge >  > [!embed-variantrule]- Emanation [Area of Effect] >  > [!embed-variantrule]- Encounter >  > [!embed-variantrule]- Enemy >  > [!embed-condition]- Exhaustion >  > [!embed-variantrule]- Experience Points >  > [!embed-variantrule]- Expertise >  > [!embed-hazard]- Falling >  > [!embed-variantrule]- Flying >  > [!embed-variantrule]- Fly Speed >  > [!embed-variantrule]- Friendly [Attitude] >  > [!embed-condition]- Frightened >  > [!embed-condition]- Grappled >  > [!embed-variantrule]- Grappling >  > [!embed-variantrule]- Hazard >  > [!embed-variantrule]- Healing >  > [!embed-variantrule]- Heavily Obscured >  > [!embed-action]- Help >  > [!embed-variantrule]- Heroic Inspiration >  > [!embed-action]- Hide >  > [!embed-variantrule]- High Jump >  > [!embed-variantrule]- Hit Point Dice >  > [!embed-variantrule]- Hit Points >  > [!embed-variantrule]- Hostile [Attitude] >  > [!embed-variantrule]- Hover >  > [!embed-variantrule]- Illusions >  > [!embed-variantrule]- Immunity >  > [!embed-variantrule]- Improvised Weapons >  > [!embed-condition]- Incapacitated >  > [!embed-variantrule]- Indifferent [Attitude] >  > [!embed-action]- Influence >  > [!embed-variantrule]- Initiative >  > [!embed-condition]- Invisible >  > [!embed-variantrule]- Jumping >  > [!embed-variantrule]- Knocking Out a Creature >  > [!embed-variantrule]- Lightly Obscured >  > [!embed-variantrule]- Line [Area of Effect] >  > [!embed-variantrule]- Long Jump >  > [!embed-variantrule]- Long Rest >  > [!embed-action]- Magic >  > [!embed-variantrule]- Magical Effect >  > [!embed-hazard]- Malnutrition >  > [!embed-variantrule]- Monster >  > [!embed-variantrule]- Nonplayer Character >  > [!embed-variantrule]- Object >  > [!embed-variantrule]- Occupied Space >  > [!embed-action]- Opportunity Attack >  > [!embed-condition]- Paralyzed >  > [!embed-variantrule]- Passive Perception >  > [!embed-variantrule]- Per Day >  > [!embed-condition]- Petrified >  > [!embed-variantrule]- Player Character >  > [!embed-condition]- Poisoned >  > [!embed-variantrule]- Possession >  > [!embed-variantrule]- Proficiency >  > [!embed-condition]- Prone >  > [!embed-variantrule]- Reaction >  > [!embed-action]- Ready >  > [!embed-variantrule]- Resistance >  > [!embed-condition]- Restrained >  > [!embed-variantrule]- Ritual >  > [!embed-variantrule]- Round Down >  > [!embed-variantrule]- Save >  > [!embed-variantrule]- Saving Throw >  > [!embed-action]- Search >  > [!embed-variantrule]- Shape-Shifting >  > [!embed-variantrule]- Short Rest >  > [!embed-variantrule]- Simultaneous Effects >  > [!embed-variantrule]- Size >  > [!embed-variantrule]- Skill >  > [!embed-variantrule]- Speed >  > [!embed-variantrule]- Spell >  > [!embed-variantrule]- Spell Attack >  > [!embed-variantrule]- Spellcasting Focus >  > [!embed-variantrule]- Sphere [Area of Effect] >  > [!embed-variantrule]- Stable >  > [!embed-variantrule]- Stat Block >  > [!embed-action]- Study >  > [!embed-condition]- Stunned >  > [!embed-hazard]- Suffocation >  > [!embed-status]- Surprised >  > [!embed-variantrule]- Swimming >  > [!embed-variantrule]- Swim Speed >  > [!embed-variantrule]- Target >  > [!embed-variantrule]- Telepathy >  > [!embed-variantrule]- Teleportation >  > [!embed-variantrule]- Temporary Hit Points >  > [!embed-sense]- Tremorsense >  > [!embed-sense]- Truesight >  > [!embed-variantrule]- Unarmed Strike >  > [!embed-condition]- Unconscious >  > [!embed-variantrule]- Unoccupied Space >  > [!embed-action]- Utilize >  > [!embed-variantrule]- Vulnerability >  > [!embed-variantrule]- Weapon >  > [!embed-variantrule]- Weapon Attack >