Noun

(wikipedia institution) (en noun)

An established organisation, especially one dedicated to education, public service, culture or the care of the destitute, poor etc.

The building which houses such an organisation.

A custom or practice of a society or community, marriage for example.

(informal) A person long established with a certain place or position.

The act of instituting.

(obsolete) That which institutes or instructs; a textbook or system of elements or rules.

There is another manuscript, of above three hundred years old, being an institution of physic. — Evelyn.

Noun

(uncountable) The quality of being organized.

* {{quote-magazine, date=2013-08-03, volume=408, issue=8847, magazine=(The Economist)

, title= The machine of a new soul , passage=The yawning gap in neuroscientists’ understanding of their topic is in the intermediate scale of the brain’s anatomy. Science has a passable knowledge of how individual nerve cells, known as neurons, work. It also knows which visible lobes and ganglia of the brain do what. But how the neurons are organised in these lobes and ganglia remains obscure. Yet this is the level of organisation that does the actual thinking—and is, presumably, the seat of consciousness.}}

(uncountable) The way in which something is organized, such as a book or an article.

(countable) A group of people or other legal entities with an explicit purpose and written rules.

(countable) A group of people consciously cooperating.

(baseball) A major league club and all its farm teams.