proving ground

Definitions

1. A terrain or installation for testing weapons, military equipment, or tactics.
2. A venue or project in which new technologies, methods, or techniques are tested.
   figuratively

Equivalents

Examples

“To test⟳ the new equipment and vehicles that will work⟳ to the high voltage a.c. system, a proving ground was sought at a convenient point⟳, and the lines from Colchester to Clacton and Walton have⟳ been selected.”

“Several design⟳ issues emerged quite quickly with the Mirrlees engine, and so these locomotives can be seen as its rail-traction proving ground.”

CEFR level