: the rear part of the human body especially from the neck to the end of the spine. They were left with nothing but the clothes on their backs. Put your back into it! She had surgery on her back. …

If something is on the back burner, it is not being dealt with at the present time, especially because it is not urgent or important, but it will be dealt with in the future:

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

You use back in expressions such as out back to refer to the area behind a house or other building. You also use in back in American English to refer to the rear part of something, …

When you lie on the grass on your back, you can watch the clouds in the sky above you. There are dozens of ways to use the word back. You might have back pain, or stroke your cat's back. …

Jun 13, 2015 · (comparable, phonetics) Pronounced with the highest part of the body of the tongue toward the back of the mouth, near the soft palate (most often describing a vowel).

back out (of) to fail to keep an engagement or promise; withdraw from; abandon: You can't back out now. Two entrants have backed out of competing in the marathon.