English · Daily Life
sit up
/sɪt ʌp/
[/sɪt ʌp/]
rise to a sitting position
Beginnerverb
Definition
To move from lying down to a sitting position, or to stay awake late.
Example
The baby can sit up by herself now.
The baby can sit up by herself now.
Etymology
From 'sit' plus 'up', emphasising the upright sitting position.
How & Where It’s Used
Common in describing posture or staying awake.