What is the meaning of combination?

noun

• A collection of things that have been combined; an assemblage of separate parts or qualities.
• A coordinated sequence of chess moves.
• A sequence of numbers or letters that opens a combination lock.
  • usage: "he forgot the combination to the safe"
• A group of people (often temporary) having a common purpose.
  • usage: "they were a winning combination"
• 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. )
• The act of arranging elements into specified groups without regard to order.
• The act of combining things to form a new whole.
  • synonyms: combining, compounding