the part of the body that is opposite to the front, from the shoulders to the bottom of the spine, the side of something that is not normally seen or used, toward the original starting point or place

behind someone's back, have someone's back, pat on the back

Formal and Informal Expressions of back

In different contexts, you can replace 'back' with suitable alternatives. In a more formal setting, 'posterior, dorsum' is apt. In informal speech or writing, 'butt, rear end' is a commonplace synonym.

back: Explore its Definition & Usage

back Definition

1the part of the body that is opposite to the front, from the shoulders to the bottom of the spine
2the side of something that is not normally seen or used
3toward the original starting point or place

Using back: Examples

Take a moment to familiarize yourself with how "back" can be used in various situations through the following examples!

Example
He has a tattoo on his back.
Example
The back of the book has an index.
Example
I'm going back to my hometown for the holidays.

back Synonyms and Antonyms

Synonyms for back

rear
spine
reverse
hindquarters

Antonyms for back

Phrases with back

behind someone's back
without someone's knowledge or approval
Example
She was talking about me behind my back.
have someone's back
to be ready and willing to help and support someone
Example
I know I can count on my best friend to have my back.
pat on the back
an expression of praise or approval
Example
He gave me a pat on the back for a job well done.

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Summary: back in Brief

The term 'back' [bæk] refers to the rear part of the body or object, opposite to the front. It can also mean returning to an original place or direction. Examples include 'He has a tattoo on his back' and 'I'm going back to my hometown for the holidays.' Phrases like 'behind someone's back' and 'have someone's back' denote secrecy and support, respectively.