mull over mull over {v. phr.} To consider; think over. He mulled over the offer for some time, but finally rejected it. Categories: add yours time {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: M Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Post my comment