open shop . open shop {n. phr.} A factory or firm that employs both union and non-union labor. The firm refuses to adopt an open shop policy. Contrast: CLOSED SHOP. Categories: add yours {n. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: O Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment