Pronunciation: (sub"tu-rā'nē-un), [key]
1. existing, situated, or operating below the surface of the earth; underground.
2. existing or operating out of sight or secretly; hidden or secret.
1. a person or thing that is subterranean.
2. a subterrane.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.