- 1 at or toward the back of someone or something; farther back She rode off down the road with the dog running behind. The others are a long way behind. He was shot from behind as he ran away. I had fallen so far behind that trying to catch up seemed pointless.
- 2in the place where someone or something is or was I was told to stay behind after school (= remain in school). This bag was left behind after the class.
- 3 late in paying money or completing work behind (with something) She has fallen behind with the payments. behind (in something) He was really behind in his work.