From Longman Dictionary of Contemporary Englishstand up phrasal verb1STANDto be on your feet, or to rise to your feet → stand-upI’ve been standing up all day.Stand up straight and don’t slouch!Jim stood up stiffly.2[always + adverb/preposition]VERTICAL to stayhealthy or in good condition in a difficult environment or after a lot of hard use toMost of the plants stood up well to the heat.3TRUEto be proved to be true, correct, useful etc when tested to/underThe memoirs stand up well to cross-checking with other records.Without a witness, the charges will never stand up in court (=be successfully proved in a court of law).4stand somebody up informalMEET# to not meet someone who you have arranged to meetI was supposed to go to a concert with Kyle on Friday, but he stood me up.5stand up and be countedOPINION to make it very clear what you think about something when this is dangerous or might cause trouble for you →stand→ See Verb table
stand-upˈstand-up1, standup /ˈstændʌp/ adjective [only before noun]1APstand-upcomedy involves one person telling jokesalone as a performancea stand-up comedian2STANDa stand-up meeting, meal etc is one in which people stand upWe had a stand-up buffet.3VIOLENTa stand-up fight, argument etc is one in which people shout loudly at each other or are violentIf it came to a stand-up fight, I wouldn’t have a chance.4VERTICALable to stay uprighta photo in a stand-up framea stand-up collar → stand upat stand1
stand-upstand-up2, standup noun [uncountable]1APstand-up comedyMark used to do stand-up at Roxy’s Bar.2a comedian who does stand-up comedy
Examples from the Corpus
stand-up• Then they cut to a light-skinned black woman doing a stand-up in front of a building that looked familiar.• By the time we opened I was practically doing stand-up out there.• Britain's top stand-up apparently is Sean Lock.