MERLIN Meaning of MERLIN in English ■ noun a small dark falcon that hunts small birds. [ Falco columbarius .]OriginME: from Anglo-Norman Fr. merilun , from OFr. esmerillon , augmentative of esmeril , of Gmc origin. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004