sits up

Assumes an upright position

Sits up means to rise from lying down to a seated position: She sits up in bed when the alarm goes off.

It also describes maintaining an upright posture rather than slouching: Sit up straight at the table.

To sit up can mean to stay awake past one's usual bedtime: We sat up talking until 3 a.m.

When something makes you sit up, it captures your attention suddenly: The news made investors sit up and take notice.

Related
  • bedFurniture for slumber
  • in bedReclining for sleep
  • leanLacking fat; incline
  • postureBody position, alignment
  • backReverse side; support

rise · crunches · straighten · erect · alertness · attention · startled · mattress · knees · push · spine · nightmare · seat · jerks · takes notice · pays attention · stretches · surprise

Opposites
body position

sits uplies down

Assumes resting position

reclines · lies back · slumps · slouches · collapses

alertness/attention

sits upnods off

Falls briefly asleep

zones out · drifts off · tunes out · relaxes · dozes off

Family

up, sit, upright, sitting, sits, sitter, upturn, sat up, sitters

Familiarity
Top 50,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G