Actor
A placeable object in a level.
An Actor is one of the most important building blocks in Unreal. Characters, lights, doors, and many other objects are Actors or Actor-based types.
Unreal Engine glossary
Unreal Engine mixes high-end rendering with a strong visual scripting workflow. Many core terms describe actors, levels, and Blueprint-driven behavior.
Blueprint
Unreal’s visual scripting system.
Blueprint lets you create gameplay logic by connecting nodes. It is one of the fastest ways for beginners to test interaction ideas.
Level
A playable or editable environment file.
A Level is similar to a scene in other engines. It contains placed Actors and level-specific setup.
Pawn
A controllable actor, often used for players.
A Pawn is an Actor type designed to be possessed or controlled. Characters are a more specialized form often built on top of Pawns.
Widget Blueprint
A UI asset built with UMG.
Widget Blueprints let you make menus, HUDs, and interface elements with a Designer view and a Graph for logic.
BeginPlay
A startup event.
BeginPlay fires when an Actor or level begins running. It is often the first event beginners use to initialize gameplay or create widgets.