sit-up

noun \ ˈsit-ˌəp \

Definition of sit-up

:a conditioning exercise performed from a supine position by raising the torso to a sitting position and returning to the original position without using the arms or lifting the feet

First Known Use of sit-up

1938


sit up

verb

Definition of sit up

intransitive verb
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

First Known Use of sit up

13th century


SIT-UP Defined for English Language Learners

sit-up

noun

Definition of sit-up for English Language Learners

  • : an exercise in which you lie on your back and use your stomach muscles to raise the top part of your body to a sitting position


SIT-UP Defined for Kids

sit-up

noun \ ˈsit-ˌəp \

Definition of sit-up for Students

:an exercise done by lying on the back and rising to a sitting position

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