LEGATE A LATERE Meaning of LEGATE A LATERE in English [ ˌlɛgət α:'latəreɪ , -ri ]■ noun a papal legate of the highest class, with full powers.OriginC16: from legate + L. a latere 'by a third party'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004