| back | the position of a player on a football team who is stationed behind the line of scrimmage |
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| back | a support that you can lean against while sitting |
| back | the part of a garment that covers your back |
| back | the front and back covering of a book |
| back | the side that goes last or is not normally seen |
| back | the posterior part of a human (or animal) body from the neck to the end of the spine |
| back | the series of vertebrae forming the axis of the skeleton and protecting the spinal cord |
| back | the part of something that is furthest from the normal viewer |
| back | (football) a person who plays in the backfield |
| back | strengthen by providing with a back or backing |
| back | establish as valid or genuine |
| back | shift to a counterclockwise direction |