noun (n)

• an arrangement of people or things acting as a unit(noun.group)

  Example:
  A defensive formation.
  A formation of planes.
  

  source: wordnet30
• the act of fabricating something in a particular shape(noun.act)

  Synonym:
  shaping
  

  source: wordnet30
• the act of forming or establishing something(noun.act)

  Synonym:
  constitution, establishment, organisation, organization
  

  source: wordnet30
• (geology) the geological features of the earth(noun.object)

  Synonym:
  geological formation
  

  source: wordnet30
• a particular spatial arrangement(noun.artifact)

  source: wordnet30
• natural process that causes something to form(noun.process)

  Example:
  The formation of gas in the intestine.
  The formation of crystals.
  The formation of pseudopods.
  

  source: wordnet30
• creation by mental activity(noun.act)

  Example:
  The formation of sentences.
  The formation of memories.
  

  source: wordnet30
• The act of giving form or shape to anything; a forming; a shaping.(noun)

  source: webster1913