as a rule as a rule {adv. phr.} Generally; customarily. As a rule, the boss arrives at the office about 10 A.M. Categories: add yours {adv. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: A Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Leave my opinion