A composer, conductor, or a performer of music; more specifically, it's a person who sings and/or plays a musical instrument as a hobby, an occupation, or a profession.

plural of musician

plural of musicianer

(slang) musician

plural of session musician

(music) A professional musician employed by other musicians or singers, either to play live or to make recordings

plural of pop musician

A person who composes, plays, or sings pop music.

A musician who performs in a public place, often for money.

plural of street musician