Definition of proving ground noun from the Oxford Advanced Learner's Dictionary


proving ground

BrE BrE//ˈpruːvɪŋ ɡraʊnd//
; NAmE NAmE//ˈpruːvɪŋ ɡraʊnd//
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a place where something such as a new machine, vehicle or weapon can be tested It's an ideal proving ground for the new car. (figurative) The club is the proving ground for young boxers.
See the Oxford Advanced American Dictionary entry: proving ground