draw up is a verb meaning "form or arrange in order or formation, as of a body of soldiers". It carries 5 recorded senses.
form or arrange in order or formation, as of a body of soldiers
straighten oneself
“He drew himself up when he talked to his superior”
Definitions, synonyms and semantic relations for draw up come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.