v. 1. To rise to a standing position; get up on your feet. A gentleman stands up when a lady enters a room. 2. To be strong enough to use hard or for a long time. A rocket must be built strongly to stand up under the blast-off. The old car has already stood up for twenty years.
Compare: WEAR WELL. 3. informal To make a date and then fail to keep it. June cried when Bill stood her up on their first dale.