Pronunciation (UK) (US) IPA (key): /ˈfæktəri/ or /ˈfæktri/ Audio (UK)(file) Noun Singular factory Plural factories (countable) A factory is a building where lots of things are made. This factory makes one hundred cars every day. (idiomatic) A factory is anything that makes other things, especially if it makes a really large amount of things. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads