as one man as one man {adv. phr.} Unanimously; together; involving all. The audience arose as one man to applaud the great pianist. Categories: add yours {adv. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: A Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Leave my opinion