assembly Definition

1. A group of people gathered together, especially for a meeting.
2a. The act of assembling;

Thesaurus: gathering, congregation, throng, assemblage, meeting, association.
2b. The state of being assembled.
3. The procedure of putting together the parts of something, such as a machine, a piece of furniture, etc.

Thesaurus: construction, manufacture, building, piecing together, joining; Antonym: separation, dismantling, wrecking.