sit up meaning
- 1. sit up to move into a sitting position after you have been lying down:
▪ Wendy sat up in bed and stretched.
▪ Are you able to sit up and eat something?
sit-up n C an exercise for your stomach muscles, in which you sit up from a lying position while keeping your feet on the floor:
▪ Sit-ups are best done with your hands behind your neck.
2. sit up to make your back straighter when you are sitting:
▪ As the news comes on TV, Ken sits up in his chair and starts watching.
▪ Sandie forced herself to sit up straight during the interview.
3. sit up to stay awake and not go to bed:
▪ I thought I'd sit up and wait for him to come home.
▪ They sat up late into the night talking about old times.
■ SIMILAR TO: stay up
4. sit up and take notice to suddenly start paying attention to someone or something:
▪ People are starting to sit up and take notice about the dangers of genetically modified foods.
1. to rise from a lying to a sitting position.
When the alarm went off, he sat up and put his feet on the f loor.
She couldn't sleep, so she sat up and read a book.
2. to sit more straight in one's seat; to hold one's posture more upright while seated.
Please sit up. Don't slouch!
You wouldn't get backaches if you would sit up.
- he had to sit up to catch his breath.
- the patient was only able to sit up.
- the patient is well enough to sit up in bed now.
- he will often sit up all night.
- i'll make everyone sit up.