:a significant practice, relationship, or organization in a society or culture
:something or someone firmly associated with a place or thing
- the institution of marriage
- she has become an institution in the theater
:an established organization or corporation (such as a bank or university) especially of a public character
:a facility or establishment in which people (such as the sick or needy) live and receive care typically in a confined setting and often without individual consent
- … the testator disinherited her siblings over their efforts to have her committed to a mental institution in the wake of several suicide attempts.
- —William M. McGovern Jr.