ketchup /ˈkɛt͡ʃ.əp/noun 2verb 1forms 3phrases 1 noun2 •Ellipsis of tomato ketchup (“a tomato-vinegar-based sauce, sometimes containing spices, onion or garlic, and (especially in the US) sweeteners”).This diner serves ketchup in red bottles, and mustard in yellow ones. •(no longer used) Such a sauce more generally (not necessarily based on tomatoes, but with mushrooms, fish, etc.). This is the older meaning.The bottles, however, were port bottles, but contained mushroom ketchup; […] — 1883 verb1 •To cover with ketchup.It strikes me she's "ketchupped" the lot! I won't touch a morsel! — 1867 formsketchupped · ketchupping · ketchups Phrases with ketchup marry the ketchupTo combine ketchup from half-empty bottles in a restaurant, in order to reduce the number of bottles.