# Meat Engine Meat separates reusable first-person game capabilities from one game's concrete world and creatures. ## Language **Level Definition**: A complete engine-shaped input for creating one live Level. Game code produces it from concrete values and definitions; it is not the worker rendering payload. _Avoid_: Scene assembly **Level**: A live playable world created from a Level Definition, including terrain, actors, collision, and rendering state. _Avoid_: Map, scene **Terrain**: A bounded ground surface that can report height at any horizontal world position. _Avoid_: Ground mesh **Actor Definition**: A concrete reusable definition of one moving thing's behavior, representation, transform, and physical presence. Actor instances reference definitions directly. _Avoid_: Mob kind, actor kind, type registry **Prefab**: A concrete reusable definition for static level content, including its geometry and optional physical presence. Placed prefabs reference definitions directly. _Avoid_: Prop kind, tree kind, species registry **Render Scene**: The behavior-free rendering projection of a Level. _Avoid_: Level