Definition of "on trial" [on trial]

• In the process of being tested or tried (adjective)

WordNet. Princeton University. 2010.

• "It happened to be the year O. J. Simpson was on trial for murder, 168 people were killed when a federal building in Oklahoma City was destroyed, and everyone was talking about the Unabomber."
• "It took putting the Liberty City crew on trial three times to get a jury to convict them."
• "“Have you any tangible evidence to suggest that Salvidienus should be put on trial for maiestas?”"