back

noun

1.
the posterior part of a human (or animal) body from the neck to the end of the spine
dorsum
2.
the side that goes last or is not normally seen
rear
Derived from:
back
3.
the part of something that is furthest from the normal viewer
rear
Antonym:
front
4.
(football) a person who plays in the backfield
5.
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
backridge ridgebone backbone rachis spinal column spine vertebral column
6.
the protective covering on the front, back, and spine of a book
binding book binding cover
Derived from:
back
7.
the part of a garment that covers the back of your body
8.
a support that you can lean against while sitting
backrest
9.
(American football) the position of a player on a football team who is stationed behind the line of scrimmage