sit up

2 ENTRIES FOUND:

sit up

intransitive verb

Definition of SIT UP

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

Browse

Next Word in the Dictionary: sit–upon
Previous Word in the Dictionary: sit–up
All Words Near: sit up

Seen & Heard

What made you want to look up sit up? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More