Definition of subterraneity in English:

subterraneity

noun

  • The state or condition of being subterranean; (also concrete) a place or thing which is underground.

Origin

Late 17th century. From classical Latin subterrāneus + -ity; compare -eity.

Pronunciation

subterraneity

/ˌsʌbtɛrəˈneɪɪti//ˌsʌbtɛrəˈniːɪti/