If "audition" refers to a performance for selection:
* Rejection: This is the direct opposite of being selected, but it doesn't necessarily mean the performance was bad.
* Dismissal: Similar to rejection, but may imply a more formal decision.
* Not selected: A neutral alternative to rejection.
If "audition" refers to the act of trying out:
* Not trying out: This is the most basic antonym, simply meaning to not participate in the audition process.
* Forgoing: This implies a deliberate decision to not participate in the audition.
If "audition" refers to the act of listening:
* Ignoring: This is the opposite of paying attention.
* Disregarding: This implies a conscious decision to not listen.
The best antonym for "audition" will depend on the specific context and what you want to emphasize.