Its research time.
Here are the basics according to Brute.
Compound: Multi-joint lift. Brings multiple areas of the body into play to complete the lift.
Example: Squat, Deadlift, Bench, Power Clean
Isolation: Single Joint lift. Focuses on a single muscle.
Example: Preacher Curl, triceps extension
Isometric: Holding a static position against force
Example: Plank, static hold