Noun: sit-up sit úp
- A stomach exercise in which a person sits up from a supine position without using the arms for leverage
"She included sit-ups in her daily core workout routine"
- Change to an upright sitting position
"He sat up in bed"
- Not go to bed
"We sat up all night to watch the election";
- stay up
Derived forms: sitting up, sat up, sit-ups, sits up
Type of: change posture, stomach exercise, tummy crunch, wake
Encyclopedia: Sit-up
Sit up