Made neither of flesh-meat nor with the gravy of flesh-meat: applied to the dishes used by Roman Catholics during Lent and on the days on which abstinence from flesh-meat is enjoined.Of or pertaining to a fast or fast-day.n. An acanthopterygian fish of the genus Sciæna, specifically S. aquila, a large and very powerful fish common in the Mediterranean and occasionally taken on the British coasts.