SAMHAIN Meaning of SAMHAIN in English [ saʊn , 'saʊɪn , 'sawɪn ]■ noun 1 November, celebrated by the ancient Celts as a festival marking the beginning of winter and their new year.OriginIr., from Old Ir. samain . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004