The antonyms of under average are numerous and convey a wide range of meanings. Some of them include above average, exceptional, excellent, outstanding, superior, and top-notch. These words indicate that something is above the norm or surpasses expectations. Others antonyms of under average include exceptional, outstanding, and excellent, which denote something that is truly exceptional or outstanding for its quality, merit or performance. On the other hand, words like mediocre or subpar describe something that is typical, plain, or substandard. Therefore, when we use antonyms for the word "under average", we can convey a positive or a negative connotation depending on the context in which they are used.