* Formal Organization: "The university is a prestigious institution of higher learning."
* Established Practice: "Marriage is an institution that has existed for centuries."
* Building: "The children were excited to visit the historic institution, a former prison turned into a museum."
* Power/Authority: "The government, as an institution, is responsible for the well-being of its citizens."
* Habit/Routine: "Getting up early and having coffee has become an institution for me."
Let me know if you'd like to see more examples!