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Definitions

underwater

[uhn-der-waw-ter, -wot-er] / ˈʌn dərˈwɔ tər, -ˈwɒt ər /
ADJECTIVE
under the water's surface
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In January 2022, the underwater volcano Hunga Tonga-Hunga Ha'apai in the South Pacific produced one of the most powerful eruptions in modern history.

From Science Daily • May 10, 2026

The NGO is hoping to plant 36 hectares of coral by 2030, which scientific director Diana Tarazona calls reviving "underwater cities."

From Barron's • May 7, 2026

Study suggests two underwater faults could each generate 7.1 quakes, swamping areas near shore with 30-foot waves.

From Los Angeles Times • May 4, 2026

Sewage and agricultural pollution in rivers is having an "alarming" knock-on impact on marine life in underwater forests along the British coastline, according to new research.

From BBC • May 2, 2026

These diesel-electric subs could cruise underwater on battery power for up to forty-eight hours, but to recharge they needed to approach the surface, take in oxygen, and run their diesel engines.

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin