SIT UP


Meaning of SIT UP in English

[sit up] vi (13c) 1 a: to rise from a lying to a sitting position b: to sit with the back erect

2: to show interest, alertness, or surprise "sit up and take notice"

3: to stay up after the usual time for going to bed "sat up late to watch the movie"

Merriam-Webster English vocab.      Английский словарь Merriam Webster.