Worcestershire sauce UK /ˈwʊstəʃə ˈsɔːs/US /ˈwʊs.tɚ.ʃɚ ˈsɔs/ noun1 •An English condiment made with vinegar, onions, garlic, etc.; a thin, piquant sauce used as a table sauce, to flavour casseroles etc. and as an ingredient in Bloody Marys. formsWorcestershire sauces