QUATREFOIL Meaning of QUATREFOIL in English [ 'katrəfɔɪl ]■ noun an ornamental design of four lobes or leaves, resembling a flower or clover leaf.OriginC15: from Anglo-Norman Fr., from OFr. quatre 'four' + foil 'leaf'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004