GYRUS Meaning of GYRUS in English [ 'dʒʌɪrəs ]■ noun ( plural gyri -rʌɪ ) Anatomy a ridge or fold on the cerebral surface of the brain.OriginC19: from L., from Gk guros 'a ring'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004