RhymeZone: institution definitions

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