back

/bæk/ noun [C]

Definition

NOT FRONT › the part of something that is furthest from the front or in the opposite direction to the front: He wrote his number down on the back of an envelope. We were sitting near the back and couldn't see much. I always keep a blanket in the back of the car.

BODY › the part of your body from your shoulders to your bottom: back injuries/pain He was lying on his back.

SEAT › the part of a seat that you lean against when you are sitting: the back of a chair

back to front UK › with the back part of something where the front should be: You've got your trousers on back to front.

in back of US › behind: They sat in back of us on the plane.

→ See also a pat on the back → See also be (like) water off a duck's back

(Definition of back noun from the Cambridge Learner's Dictionary © Cambridge University Press)