1. (verb)stand-up requiring a standing position "a stand-up bar"; "a stand-up comic"
2. (verb)arise, rise, uprise, get up, stand up rise to one's feet "The audience got up and applauded"
3. (verb)stand up refuse to back down; remain solid under criticism or attack
4. (verb)stand, stand up, place upright put into an upright position "Can you stand the bookshelf up?"
5. (verb)stand, stand up be standing; be upright "We had to stand for the entire performance!"
6. (verb)stand up, stick up defend against attack or criticism "He stood up for his friend"; "She stuck up for the teacher who was accused of harassing the student"
7. (verb)stand up, hold up, hold water resist or withstand wear, criticism, etc. "Her shoes won't hold up"; "This theory won't hold water"
8. (verb)bristle, uprise, stand up rise up as in fear "The dog's fur bristled"; "It was a sight to make one's hair uprise!"
Definitions of stand up 
