WordReference Random House Unabridged Dictionary of American English © 2025
tri′al run′, 
  1. a preliminary performance or test of something, as of the operation of a ship or the effectiveness of a play.
  • 1900–05

'trial run' also found in these entries (note: many are not synonyms or translations):
dummy run - prep - trial

Forum discussions with the word(s) "trial run" in the title:


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