levelheaded levelheaded {adj. phr.} Having good common sense; practical; reasonable. What our office needs is a good, level-headed manager. Categories: add yours {adj. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: L Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Discuss