stand-up (Adjective) — Requiring a standing position. ex. "a stand-up bar" ex. "a stand-up comic"
stand-up (Noun) — A comedian who uses gags.
stand-up (Verb) — Get on one's feet from a sitting or kneeling position. ex. "The audience stood up and applauded"
stand-up (Verb) — Refuse to back down; remain solid under criticism or attack.
stand-up (Verb) — Put into an upright position.
stand-up (Verb) — Be standing; be upright. ex. "We had to stand up for the entire performance!"
stand-up (Verb) — Defend against attack or criticism. ex. "He stood up for his friend"
stand-up (Verb) — Resist or withstand wear, criticism, etc.. ex. "Her shoes won't stand up"
stand-up (Verb) — Rise up as in fear. ex. "The dog's fur stood up"
stand-up (Verb) — Fail to keep an appointment, esp. not to turn up for a date.