stand-up (also stand·up / ˈstandˌəp/ ) • adj. 1. involving, done by, or engaged in by people standing up: a stand-up party. ∎ such that people have to stand rather than sit: a stand-up bar. ∎ (of a comedian) performing by standing in front of an audience and telling jokes. ∎ (of comedy) performed in such a way: his stand-up routine depends on improvised observations.2. inf. courageous and loyal in a combative way: he was a stand-up kind of guy3. designed to stay upright or erect.• n. a comedian who performs by standing in front of an audience and telling jokes. ∎ comedy performed in such a way: he began doing stand-up when he was fifteen. ∎ a brief monologue by a television news reporter.