The meaning of SUBTERRANEAN is being, lying, or operating under the surface of the earth. How to use subterranean in a sentence. Go Underground With Subterranean.

SUBTERRANEAN definition: existing, situated, or operating below the surface of the earth; underground. See examples of subterranean used in a sentence.

Combat between large derived societies: a subterranean army ant established as a predator of mature leafcutting ant colonies.

Jan 20, 2026 · Adjective subterranean (not comparable) Below ground, under the earth, underground.

sub•ter•ra•ne•an (sub′tə rā′ nē ən), adj. Also, sub′ter•ra′ne•ous. existing, situated, or operating below the surface of the earth; underground. existing or operating out of sight or secretly; hidden or secret. n. a …

1. existing, situated, or operating below the earth's surface; underground. 2. existing or operating out of sight or secretly. n. 3. a person or thing that is subterranean.

subterranean meaning, definition, what is subterranean: beneath the surface of the Earth: Learn more.

Definition of subterranean adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Subterranean is an adjective that describes something just below what can be seen, like the subterranean jealousy you hide under a smile and kind words for the actor who got the part you …

A subterranean river or tunnel is under the ground. The city has many subterranean passages.