n. A chain; a connected series of notions, arguments, or objects generally; a series of which each part or member has a close connection, like that of a link, with the preceding and following parts.n. A methodized series of selections from different authors to elucidate a doctrine or a system of doctrines; specifically, such a set of quotations from the church fathers to assist in the study of Christian dogmatics or biblical exegesis: as, the Catena Aurea of St. Thomas Aquinas.n. An Italian measure of length, a chain, equal in Naples to 52.07 feet, and in Palermo to 26.09 feet.