LACTATE Meaning of LACTATE in English ~ 1 [ lak'teɪt ]■ verb (of a female mammal) secrete milk.OriginC19: back-form. from lactation . ———————— ~ 2 [ 'lakteɪt ]■ noun Chemistry a salt or ester of lactic acid. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004