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The meaning and origin of interesting English phrases

Dry run

Meaning

A dry run is a practice or rehearsal of an activity or procedure without the use of live ammunition, actual materials, or real consequences.

Origin

Picture the early 20th century, when fire brigades and military units began to perfect their training. A "dry run" was exactly what it sounds like: going through every step of an emergency, a battle plan, or a complex operation—but without the messy, dangerous, or expensive "wet" elements. Firefighters would meticulously set up hoses and climb ladders, but no water would gush. Soldiers would move through intricate maneuvers, barking orders and simulating combat, yet no ammunition was ever loaded. It was all about precision and practice, a way to iron out every kink and ensure everyone knew their role, so when the real crisis hit, the team would perform flawlessly, without a drop of wasted effort or error.

Examples

  • Before the grand opening, the restaurant staff conducted a dry run of their full dinner service to iron out any potential issues.
  • The engineering team performed a complete dry run of the software deployment, ensuring all steps were documented and understood.
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