proving ground

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English

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Noun

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proving ground (plural proving grounds)

  1. (military) A terrain or installation for testing weapons, military equipment, or tactics.
    Hypernym: ground
  2. (figurative) A venue or project in which new technologies, methods, or techniques are tested.
    Synonym: testing ground
    • 2021 June 30, David Clough, “Brush: a UK rail icon”, in RAIL, number 934, page 55:
      Several design issues emerged quite quickly with the Mirrlees engine, and so these locomotives can be seen as its rail-traction proving ground.

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