* Noun: This is the most common usage. It refers to the highest point of a mountain, or a meeting of high-level officials.
* Verb: It can mean to reach the highest point or to achieve the highest level of success.
* Adjective: It can describe something that is at the highest point or level.
Examples:
* Noun: "The climbers reached the summit of Mount Everest."
* Verb: "The company summited its goals for the year."
* Adjective: "This is a summit level meeting."
Without context, it's impossible to know the specific part of speech.