The meaning ofEXCELLENTis very good of its kind : eminently good : first-class. How to useexcellentin a sentence.
Something that isexcellentis extremely good. The recording quality isexcellent.
Something excellent isvery good, great, or high quality:this is one of the best compliments around. Words like extraordinary and exceptional are similar in meaning to excellent.

Definition ofexcellentadjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
The car is inexcellentcondition. She enjoysexcellenthealth. “At last we're making a profit!” “ (That's)Excellent!”

(Definition ofexcellentfrom the Cambridge Academic Content Dictionary © Cambridge University Press)
Something that isexcellentis very good indeed. The recording quality isexcellent. Luckily, Sue is very efficient and does anexcellentjob as Fred's personal assistant.
Mario's English pronunciation isexcellent. She's anexcellentteacher. From the company's point of view, this is anexcellentopportunity. The island has twoexcellentbeaches. The lemon cake proved to be anexcellentchoice.