ketchup (ˈkɛtʃəp) , catchup or catsup n (Cookery) any of various piquant sauces containing vinegar:tomato ketchup. [C18: from Chinese (Amoy)kōetsiapbrine of pickled fish, fromkōeseafood +tsiapsauce] Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © Harp...