n. The act of assembling or the state of being assembled; association.n. A collection of individuals or of particular things: as, an assemblage of noted men; an assemblage of various materials.n. The act of fitting together, as parts of a machine; in carpentry and joinery, a union of parts or pieces by framing, dovetailing, etc. See assembling.n. In the logicomathematical science of multitude, otherwise called the theory of cardinal numbers, a collection, not in the sense that the objects are assembled or collected, but merely in the sense that many things are regarded in thought as constituting one thing.