Worcestershire sauce or Worcester sauce is a fermented liquid condiment invented by the pharmacists John Wheeley Lea and William Henry Perrins in the city of Worcester in Worcestershire, England, during the first half of the 19th century. The inventors went on to form the company Lea & Perrins.

A condiment is a preparation that is added to food, typically after cooking, to impart a specific flavor, to enhance the flavour, or to complement the dish. A table condiment or table sauce is more specifically a condiment that is served separately from the food and is added to taste by the diner.