In, to, or toward the rear: He stood behind the chair. The moon disappeared behind a cloud. We walked behind. How to use behind in a sentence. Behind synonyms, behind pronunciation, behind translation, english dictionary definition of behind. I put one of the cushions behind his head. If something is behind a thing or person, it is on the other side of them from you, or nearer their back rather than their front. It may also refer to (a fixed) time: At the back (of): Behind applies primarily to position in space, and suggests that one person or thing is at the back of another; The meaning of behind is in the place or situation that is being or has been departed from. They were parked behind the truck. In baseball, if the pitcher (= the player who throws the ball) is behindā¦.