Obs. rare. [f. next + -ITY.] The condition of being subterraneous; concr., a place or thing found under ground.
1686. Sir T. Browne’s Pseud. Ep., II. i. 42. I fear we commonly consider subterraneities [earlier edd. subterranities], not in Contemplations sufficiently respective unto the Creation.
1721. Bailey, Subterraneity, a being subterraneous.
1807. trans. Three Germans, I. 69. The flight of steps by which they had been conducted to the subterraneity.
