refinery

noun, plural re·fin·er·ies.

1. an establishment for refining something, as metal, sugar, or petroleum.

noun plural -eries

1. a factory for the purification of some crude material, such as ore, sugar, oil, etc

n.

1727, from refine + -ery. Originally in metallurgy and sugar-making; of petroleum by 1865.

1. An industrial plant that uses mechanical and chemical means to purify a substance, such as petroleum or sugar, or to convert it to a form that is more useful.