FUSTY Meaning of FUSTY in English ■ adjective ( fustier , fustiest ) 1》 smelling stale, damp, or stuffy. 2》 old-fashioned.Derivativesfustily adverbfustiness noun OriginC15: from OFr. fuste 'smelling of the cask'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004