ON TRIAL

{adv.} or {adj. phr.} 1. For testing or trying out for a time before making a decision. * /I was lucky that I had bought the machine on trial because I didn't like it and was able to return it./ * /Mother bought a new dishwasher on trial and was trying it out before deciding whether to keep it./ 2. In a court being tried for a crime before a judge or jury. * /John White was on trial for murder./ * /Mary was on trial before the Student Committee for spoiling school property./