Read the dictionary definition of assembly. All definitions for this word.
1. the act of constructing something (as a piece of machinery)
2. the social act of assembling
1. they demanded the right of assembly
3. a group of machine parts that fit together to form a self-contained unit
4. a unit consisting of components that have been fitted together
5. a public facility to meet for open discussion
6. a group of persons who are gathered together for a common purpose