IPA: //kɔːrˈnɛtɪst//
KK: /kɔrˈnɛtɪst/
A person who plays a brass musical instrument called a cornet, which is similar to a trumpet.
The cornetist played a beautiful solo during the concert.
Cornetist is formed from "cornet" (from Old French *cornet*, meaning a small horn) and "-ist" (meaning a person who practices or is concerned with). The word refers to a person who plays the cornet, a brass musical instrument.
Think of a 'cornet' as a small horn, and the '-ist' means a person who plays it. So, a cornetist is someone who plays the cornet.