subterraneity

Noun

subterraneity (countable and uncountable, plural subterraneities)

1. (rare, uncountable) The quality of being subterranean.
   • SUBTERANEITY,^([sic]) a being ſubterraneous.[1721, N[athan] Bailey, “SUBTERANEITY”, in An Universal Etymological English Dictionary: […], London: […] E. Bell, J. Darby, […], →OCLC, column 1
   • The centralisation on which the empire is now firmly erected was the subterranean work which proceeded in the eighteenth century, though nothing appeared above ground but a feudal monarchy. The void in local administration and power which was left when the noblesse migrated to Paris and became a...1861, “The Origin”, in The Progress of Nations or The Principles of National Development in Their Relation to Statesmanship: A Study in Analytical History, London: Longman, Green, Longman, and...

   Synonyms:

   subterraneanity, subterraneanness, subterraneousness

2. (countable, rare) Something that is subterranean.
   • Every big post office has one. Some have dozens. St. Martin’s-le-Grand is a warren, Mount Pleasant a veritable honeycomb—a positive castle of Otranto with, in place of subterraneities, a hidden, circling passage upon every floor.1910, Austin Philips, “The Watching Gallery”, in Red Tape, London: Smith, Elder, & Co., […], page 274
   • The most elusive subterranean pulsation of the unconscious is no less a reality than a humdrum perception of a dull afternoon; but that subterranean bit of the unconscious is no more a reality, either. Let us not make a misty, swift, cavelike terror of the unknown and a meek thing of the known. The...a. 1979, Eli Siegel, “The World, Guilt and Self-Conflict”, in Self and World: An Explanation of Aesthetic Realism, New York, N.Y.: Definition Press, published 1981, →ISBN, page 77

   Synonyms:

   subterranity, subterrany