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dummy run

/ˈdʌmi rʌn/ · dum·my run
noun
  1. A trial or practice execution performed before the real attempt, to identify problems and ensure smooth operation. The crew scheduled a dummy run of the evacuation drill to work out any timing issues.
Did you know? Although "dummy run" conveys the same idea as "dry run," it is far less common in published writing, with most technical manuals preferring the latter.
Written by Lexi Wordsworth, Dictionary Editor 1 lookups Added Aug 4, 2026