OCULUS Meaning of OCULUS in English [ 'ɒkjʊləs ]■ noun ( plural oculi -lʌɪ , -li: ) Architecture1》 a circular window. 2》 the central boss of a volute. 3》 an opening at the apex of a dome.OriginC19: from L., lit. 'eye'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004