What is the meaning of trial?

noun

• The act of testing something.
  • usage: "in the experimental trials the amount of carbon was measured separately"; "he called each flip of the coin a new trial"
  • synonyms: test, run
• Trying something to find out about it.
  • usage: "a sample for ten days free trial"; "a trial of progesterone failed to relieve the pain"
  • synonyms: trial run, test, tryout
• The act of undergoing testing.
  • usage: "he survived the great test of battle"; "candidates must compete in a trial of skill"
  • synonyms: test
• Law) the determination of a person's innocence or guilt by due process of law. (
  • usage: "he had a fair trial and the jury found him guilty"; "most of these complaints are settled before they go to trial"
• Sports) a preliminary competition to determine qualifications. (
  • usage: "the trials for the semifinals began yesterday"
• An annoying or frustrating or catastrophic event.
  • usage: "his mother-in-law's visits were a great trial for him"; "life is full of tribulations"; "a visitation of the plague"
  • synonyms: tribulation, visitation