as·sem·bly
 /əˈsɛmbli/  noun  ,  pl   -blies
  1 [  noncount  ] : the act of connecting together the parts of something (such as a machine) : the act of assembling something
   The parts are made in this factory and then shipped to another country for assembly.
   No assembly required. [=this product is already put together]
  2 [  count  ] : a group of people who make and change laws for a government or organization
   the organization's general assembly
   elected legislative assemblies
   the New York State Assembly
   the French National Assembly
  3 [  count  ]
  3 a : a group of people who have gathered together
   an assembly of armed men
  3 b : a meeting of all the teachers and students of a school
   School assemblies were usually held in the cafeteria.
  4 [  noncount  ] : the act of gathering together to talk about issues
   Freedom of speech and freedom of assembly are protected by the U.S. Constitution.