n.
Function: noun
Date: circa 1823
: something that is manifold: as a : a whole that unites or consists of many diverse elements <the manifold of aspirations, passions, frustrations ― Harry Slochower> b : a pipe fitting with several lateral outlets for connecting one pipe with others also : a fitting on an internal combustion engine that directs a fuel and air mixture to or receives the exhaust gases from several cylinders c : SET 21 d : a topological space in which every point has a neighborhood that is homeomorphic to the interior of a sphere in Euclidean space of the same number of dimensions