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