noun (n)

• a collection of things that have been combined; an assemblage of separate parts or qualities(noun.group)

  source: wordnet30
• a coordinated sequence of chess moves(noun.group)

  source: wordnet30
• a sequence of numbers or letters that opens a combination lock(noun.group)

  Example:
  He forgot the combination to the safe.
  

  source: wordnet30
• a group of people (often temporary) having a common purpose(noun.group)

  Example:
  They were a winning combination.
  

  source: wordnet30
• an alliance of people or corporations or countries for a special purpose (formerly to achieve some antisocial end but now for general political or economic purposes)(noun.group)

  source: wordnet30
• the act of arranging elements into specified groups without regard to order(noun.act)

  source: wordnet30
• the act of combining things to form a new whole(noun.act)

  Synonym:
  combining, compounding
  

  source: wordnet30
• The act or process of combining or uniting persons and things.(noun)

  source: webster1913