noun (n)

• a group of persons together in one place(noun.group)

  Synonym:
  gathering
  

  source: wordnet30
• a system of components assembled together for a particular purpose(noun.artifact)

  Synonym:
  hookup
  

  source: wordnet30
• the social act of assembling(noun.act)

  Synonym:
  assembly, gathering
  Antonym:
  disassembly, dismantlement, dismantling
  

  source: wordnet30
• several things grouped together or considered as a whole(noun.group)

  Synonym:
  accumulation, aggregation, collection
  

  source: wordnet30
• The act of assembling, or the state of being assembled; association.(noun)

  source: webster1913