Pronunciation IPA (key): /ˈfɔː(r)mjəˌli/ or /ˈfɔː(r)mjəˌleɪ/ or /ˈfɔː(r)mjəˌlaɪ/ Noun Singular formula Plural formulas or formulae The plural form of formula; more than one (kind of) formula.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads