subterrene adjective 1noun 1forms 3 adjective1 •underground, subterranean noun1 •(rare) A machine for drilling or tunneling underground.In the first field tests, a series of holes 2 inches in diameter and 12 feet deep were sunk with the rock-melting device, or subterrene. — 1972 formssubterrenes · more subterrene · most subterrene
