OPAH Meaning of OPAH in English [ 'əʊpə ]■ noun a large deep-bodied fish with a deep blue back, silvery belly, and crimson fins, living in deep oceanic waters. [ Lampris guttatus .]OriginC18: a W. Afr. word. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004