sit(redirected from sat up)
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v. sat (săt), sitting, sits
1. To rest with the torso vertical and the body supported on the buttocks.
a. To rest with the hindquarters lowered onto a supporting surface. Used of animals.
b. To perch. Used of birds.
3. To cover eggs for hatching; brood.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.