An adjective meaning 'excellent'; used casually in speech and advertising. Often functions like a na-adjective in Japanese.
今日のプレゼン、エクセレントだったよ。
Your presentation today was excellent.
このホテルはサービスがエクセレントで、また泊まりたいと思った。
The service at this hotel was excellent; I want to stay again.
テストで満点を取って、先生に『エクセレント！』と言われた。
I got a perfect score on the test and the teacher said, 'Excellent!'