TOPGALLANT Meaning of TOPGALLANT in English [ tɒp'gal(ə)nt , tə'gal- ]■ noun1》 (also ~ mast ) the section of a square-rigged sailing ship's mast immediately above the topmast. 2》 (also ~ sail ) a sail set on a ~ mast. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004