excllent is an adjective. An excellent thing is something that is of high quality or exceedingly good. It can refer to an object or a person's state or quality.
1. The food was excellent-- I highly recommend this restaurant.
2. Mom's homemade cookies were an excellent treat!
3. The university offers an excellent selection of degree programs.
it is important to note that excellence should be used as an adjective typically when describing attributes or qualities. Additionally, it is often used as a synonym for 'very good' or 'exceptional'.