Main Entry: stand up

Function: verb

Date: before 12th century

intransitive verb

1 : to rise to a standing position
2 : to remain sound and intact under stress, attack, or close scrutinytransitive verb : to fail to keep an appointment with

— stand up for : to defend against attack or criticism

— stand up to 1 : to meet fairly and fully
2 : to face boldly

— stand up with : to be best man or maid of honor for at a wedding ceremony