Definitions of institution:

  • noun:   an establishment consisting of a building or complex of buildings where an organization for the promotion of some cause is situated
  • noun:   a custom that for a long time has been an important feature of some group or society
    Example: "The institution of marriage"
  • noun:   an organization founded and united for a specific purpose
  • noun:   the act of starting something for the first time; introducing something new
  • noun:   a hospital for mentally incompetent or unbalanced person