I. noun
1.
the state or fact of being tested (as by suffering)
the Vietnam war period was a time of great national trial
Synonyms: affliction, calvary, cross, crucible, ordeal, tribulation, visitation
Related Word: agony, distress, misery, suffering; anguish, grief, heartbreak, sorrow, woe; adversity, misfortune; difficulty, hardship, rigor, vicissitude
Idioms: crown of thorns, fiery ordeal, trial and tribulation
2.
a source of vexation or annoyance
living in a crowded hotel is a real trial
Synonyms: care, trouble, worry
Related Word: complication, difficulty; annoyance, distress, misfortune; ordeal
3.
Synonyms: experiment , experimentation, test, trial and error, trial run
4.
Synonyms: attempt , endeavor, essay, hassle, striving, struggle, try, undertaking
II. adjective
Synonyms: experimental 2, experimentative, test