subterrain noun 4adjective 1forms 1 noun4 •The bedrock or rock layer that lies beneath the soil and superficial features of an area.In this way at least a crude picture of the subterrain can be built up during the survey. — 1982 •A cave or underground room.At the latter place you will see human habitations scooped in the rock, and families living in subterrains — what is the word ? — caverns. — 1890 •An underground region.The land under Rabbit seems to move, with the addition of yet another citizen to the subterrain of the dead. — 2006 •An underlying basis or undercurrent.For her and others, statements reverberated in enduring moral subterrains. — 2003 adjective1 •Synonym of subterranean.Some skinks have adopted a subterrain life and have dispensed with their limbs. — 1949 formssubterrains
