Trial run has 2 different meanings across 1 category:
Noun
Noun
1
trying something to find out about it
"a sample for ten days free trial"
"a trial of progesterone failed to relieve the pain"
2
An empirical test of the suitability or effectiveness of a method or thing by running it at least once.
Broader Terms (hypernyms)
Narrower Terms (hyponyms)