noun A pipe or chamber branching into several openings. (US aircraft attacked the pipeline manifold feeding the Sea Island) A collection of points forming a certain kind of set, such as those of a topologically closed surface or an analogue of this in three or more dimensions. (in Kantian philosophy) the sum of the particulars furnished by sense before they have been unified by the synthesis of the understanding.
adjective Many and various. (the implications of this decision were manifold)