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Definition of underwater

underwater

/ˌʌndɚˈwɔːtɚ/
un · der · wa · ter
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underwater Lexical Profile

underwater Game Scores & Validity

• adjective

1

Situated, occurring, or designed for use beneath the surface of the water.

Example

"The marine biologists used specialized underwater cameras to document the coral reef."

2

Having a financial debt or mortgage balance that exceeds the current market value of the asset (especially of a loan, property, or borrower).

Example

"After the housing market crashed, millions of homeowners found themselves underwater on their mortgages."

Synonyms
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Antonyms
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• adverb

1

Beneath the surface of the water.

Example

"Sea turtles can hold their breath and remain underwater for several hours at a time."

Synonyms
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Antonyms
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• noun

1

Water lying beneath the surface of the ground or below the surface layer of a body of water.

Example

"Strong currents in the deep underwater can make navigation hazardous for submersibles."

Synonyms
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• Rhymes for underwater

• Nearby Words

underutilized
undervaluation
undervalue
underwater
underway
underwear
underweight

Word Origin & Etymology

Formed as a closed compound in the early 17th century from the prepositional phrase 'under water', combining Old English 'under' (beneath) and 'wæter' (water).

Cite this Entry

Wordmom. (2026). Definition of Underwater. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/underwater
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