cap the climax . cap the climax {v. phr.} To exceed what is already a high point of achievement. Sam's piano recital was great, but Bill's performance capped the climax. Categories: add yours {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: C Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Comment on this entry