KITH Meaning of KITH in English [ kɪθ ]■ noun (in phr. ~ and kin ) one's relations.OriginOE cȳthth ('knowledge', 'one's native land', and 'friends and neighbours'), of Gmc origin; related to couth . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004