noun
a place where sth 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.
noun
a place where sth 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.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005