noun A set of pieces that work together in unison as a mechanism or device.
In order to change the bearing, you must first remove the gearbox assembly.
noun The act or process of putting together a set of pieces, fragments, or elements.
instructions for assembly
noun A congregation of people in one place for a purpose.
school assembly
noun A legislative body.
the General Assembly of the United Nations
noun A beat of the drum or sound of the bugle as a signal to troops to assemble.
noun Ellipsis of assembly language.
noun A building block of an application, similar to a DLL, but containing both executable code and information normally found in a DLL's type library. The type library information in an assembly, called a manifest, describes public functions, data, classes, and version information.