Meaning & use
subterranean
Existing, located, or occurring below the surface of the earth.
See it in a sentence
Explorers discovered a vast subterranean river running beneath the mountain range.
The city built a subterranean tunnel system to speed up rush-hour traffic.
A note on using this word
Subterranean is a more formal or literary alternative to underground, often used in scientific or descriptive writing.
Words with a similar meaning
underground
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
Make it your own
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