DUNITE Meaning of DUNITE in English [ 'dʌnʌɪt ]■ noun Geology a green to brownish coarse-grained igneous rock consisting largely of olivine.OriginC19: from the name of Dun Mountain, New Zealand, + -ite 1 . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004