stay up

1. 1.

   not go to bed

   “Don't stay up so late--you have to go to work tomorrow”

   “We sat up all night to watch the election”

   Synonymssit up

   Broaderwake

Questions about stay up

What does stay up mean?

stay up means "not go to bed".

What is another word for stay up?

Close synonyms include sit up. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is stay up a common word?

stay up is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.