proving ground
1 ENTRIES FOUND:
proving ground
noun
plural
proving grounds
proving ground
noun
plural
proving grounds
Britannica Dictionary definition of PROVING GROUND
[count]
1
:
a place where things or people are tested or tried out for the first time
— often + for
-
The local racetrack became a proving ground for new jockeys.
2
:
a place where scientific testing is done
