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.

Add to word list under the ground: a subterranean passage / river (Definition of subterranean from the Cambridge Academic Content Dictionary © Cambridge University Press)

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

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.

Oct 7, 2025 · Adjective [edit] subterranean (not comparable) Below ground, under the earth, underground. quotations

subterranean, adj. & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

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

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; …

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

1 : the bedrock or the rocks beneath a particular geological formation 2 : subterranean