FUGACIOUS Meaning of FUGACIOUS in English [ fjʊ'geɪʃəs ]■ adjective literary tending to disappear; fleeting.Derivatives~ly adverb~ness nounfugacity noun OriginC17: from L. fugax , fugac- (from fugere 'flee') + -ious . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004