stand up in WordNet English dictionary

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

stand up in English Wiktionary