crowbar /ˈkɹoʊˌbɑɹ/noun 3verb 1forms 3 noun3 •An iron or steel bar, often with a flattened end which may also be hook-shaped, to be used as a lever to manually force things apart. •An electrical circuit that prevents an overvoltage from causing damage. •A type of cocktail made with only Crown Royal whiskey and lemon lime soda. verb1 •To force to move, usually with a crowbar; to prise.He crowbarred the door open. formscrowbarred · crowbarring · crowbars