mis|tri|al «mihs TRY uhl», noun.
1. an inconclusive trial, especially a trial in which the jury cannot agree on a verdict.
2. a trial having no effect in law because of some error in the proceedings: »
The decrepit barrister…has defended his simple little murderer so badly that he saves his life by perpetrating a mistrial (Listener).
Useful english dictionary. 2012.