Ketchup (also: Catsup and Tomato Sauce) is a condiment made from tomatoes, sugar, salt, vinegar, and spices. Ketchup is commonly eaten with foods such as hot dogs, hamburgers, and French fries (potatoes).
The word ketchup is related to the Indonesian word ketjap, which simply refers to sauces (usually hot), or catsup, a term derived from Asian cookery, a sweet or briny sauce made from tomatoes. There are numerous varieties of ketjap or catsup, none of which particularly resemble the thick, sweet and salty tomato ketchup familiar to most residents of markets where factory produced ketchup is sold.
Ketchup was first used to mask the taste of bad meat.