1. A trial performance, as by an actor, dancer, or musician, to demonstrate suitability or skill: Mary played her violin in an audition in order to be accepted to the local orchestra.
2. The sense or power of hearing (no plural form): Dr. Good told Jim that his audition was poor and that he should wear hearing aids.

An audition is the act of hearing or the sensation and perception of sounds produced by stimulation of nerve receptors in the ear.

1. To try out as a performer for a chance to be heard: Jack wanted to audition for the position of concert master in the orchestra.
2. To evaluate a person in a performance: The teacher auditioned a few students who wanted to play the main character in the stage play at school.