The meaning of BACK is the rear part of the human body especially from the neck to the end of the spine. How to use back in a sentence. Synonym Discussion of Back.

BACK definition: 1. in, into, or towards a previous place or condition, or an earlier time: 2. in return: 3. in…. Learn more.

To be in favor of; endorse or advocate: backed the reform proposal.

The back of something is the side or part of it that is towards the rear or farthest from the front. The back of something is normally not used or seen as much as the front.

Your back is your spine, or the rear part of your whole body. When you lie on the grass on your back, you can watch the clouds in the sky above you.

Although some people object to the use of in back of with the meaning "behind,'' it is fully established as standard in American English and appears in all types of speech and writing: The car was parked in …

Definition of back in the Definitions.net dictionary. Meaning of back. What does back mean? Information and translations of back in the most comprehensive dictionary definitions resource on the web.