1.Definition: (American football) the position of a player on a football team who is stationed behind the line of scrimmage

Category: General

2.Definition: (football) a person who plays in the backfield

Category: People

3.Definition: a support that you can lean against while sitting

"The back of the dental chair was adjustable"

Related Noun(s):backrest

Category: Objects

4.Definition: the part of a garment that covers the back of your body

"They pinned a `kick me' sign on his back"

Category: Objects

5.Definition: the part of something that is furthest from the normal viewer

"He stood at the back of the stage", "It was hidden in the rear of the store"

Related Noun(s):rear

Category: Places

6.Definition: the posterior part of a human (or animal) body from the neck to the end of the spine

"His back was nicely tanned"

Related Noun(s):dorsum

Category: General

7.Definition: the protective covering on the front, back, and spine of a book

Related Noun(s):cover

Category: Objects

8.Definition: the series of vertebrae forming the axis of the skeleton and protecting the spinal cord

"The fall broke his back"

Related Noun(s):backbone, rachis, spine

Category: General

9.Definition: the side that goes last or is not normally seen

"He wrote the date on the back of the photograph"

Related Noun(s):rear

Category: Objects