keep off . keep off {v. phr.} To refrain from entering; stay away from. "Keep off the grass," the sign in the park indicated. Categories: add yours {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: K Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment