KLAMATH Meaning of KLAMATH in English [ 'klaməθ ]■ noun ( plural same or ~s ) 1》 a member of an American Indian people of the Oregon–California border. 2》 the Penutian language of the ~.Originfrom Chinook. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004