noun:the point, position, or part that is equally distant from the sides, edges, or ends of something
She stood exactly in the middle of the room.
noun:the central part or section of something, such as a period of time, a story, or a physical object
The middle of the novel reveals the main character’s true motivations.
noun:the halfway point in a period of time or sequence
We took a short break at the middle of the lecture to stretch our legs.
adjective:intermediate in rank, importance, or quality; not extreme or at an end
He has a middle management position at the company.