CATAMOUNT Meaning of CATAMOUNT in English [ 'katəmaʊnt ](also ~ain ˌkatə'maʊntɪn ) ■ noun N. Amer. a puma. ↘ archaic any medium-sized or large wild cat.OriginME (as ~ain ): from the phr. cat of the mountain . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004