Of many kinds; numerous in kind or variety; varied; diverse.Exhibiting or embracing many points, features, or characteristics; complicated in character; having many parts or relations: used with nouns in the singular number: as, the manifold wisdom or the manifold grace of God (Eph. iii. 10; 1 Pet. iv. 10); “the manifold use of friendship,”n. A complicated object or subject; that which consists of many and various parts; specifically, an aggregate of particulars or units; especially, in mathematics, a multitude of objects connected by a system of relations; an ensemble.n. In Kant's theory of knowledge, the total of the particulars furnished by sense before they are connected by the synthesis of the understanding; that which is in the sense and has not yet been in thought.n. A copy or facsimile made by means of a manifold-writer, or by the use of carbon-paper in a type-writer, etc.n. A tube, usually of cast metal, with one or more flanged or screw-threaded inlets and two or more flanged or screw-threaded outlets for pipe-connections, much used in pipe-fitting for steam-heating coils, or for cooling-coils in breweries, and in other cases where it is useful to convey steam, water, or air from a large pipe into several smaller ones. Also called T-branch and header.Many times; in multiplied number or quantity.To make manifold; multiply; specifically, to multiply impressions of by a single operation, as a letter by means of a manifold-writer, or by the use of carbon-paper in a type-writer.n. In mathematics, given a general conception capable of various determinations or determination-modes, the totality of the determinable particulars is a manifold, of which each is an element. The manifold is continuous or discrete, according as the passage from one determination to another is continuous or discrete.n. Same as manifold-valve.n. The third stomach of a ruminant; the manyplies; the intestines generally.