keep house keep house (2) also play house {v. phr.}, {informal} To live together without being married. Bob and Nancy keep house these days. Categories: add yours {informal} {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 » In RussianTo section: K Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Leave my opinion