noun

1. 1. the act or process of trying, testing, or putting to the proof; test
   2. a testing of qualifications, attainments, or progress; probation
   3. experimental treatment or operation; experiment
2. 1. the fact or state of being tried by suffering, temptation, etc.
   2. a hardship, suffering, etc. that tries one's endurance
   3. a person or thing that is a source of annoyance or irritation
3. a formal examination of the facts of a case by a court of law to decide the validity of a charge or claim
4. an attempt; endeavor; effort

Etymology: Anglo-Fr < trier: see try

adjective

1. of a trial or trials
2. made, done, or used for the purpose of trying, testing, etc.