groundwater

noun

ground·​wa·​ter ˈgrau̇nd-ˌwȯ-tər How to pronounce groundwater (audio)
-ˌwä-
: water within the earth especially that supplies wells and springs

Examples of groundwater in a Sentence

There were concerns about contaminated groundwater.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Cuchimaque Lugo, an FIU graduate student, said the team’s ongoing groundwater research aims to better understand how PFAS migrate from the surface into the aquifer and eventually into drinking water supplies. — Ashley Miznazi, Miami Herald, 7 Aug. 2026 Because the river and its reservoirs are insufficient to meet water demand, groundwater has been extracted from aquifers, which have been losing water at an increasing rate, according to NASA. — Jeanine Santucci, USA Today, 7 Aug. 2026 The companies said the site will use water from Gibbons Creek Reservoir for industrial operations instead of local groundwater. — Neetika Walter, Interesting Engineering, 6 Aug. 2026 But about 18 months later, the Department of Environmental Quality is still looking at soil samples, groundwater, surface water and sediment to determine the extent of the issue, the county and the department told The Charlotte Observer. — Mary Ramsey, Charlotte Observer, 5 Aug. 2026 See All Example Sentences for groundwater

Word History

First Known Use

circa 1889, in the meaning defined above

Time Traveler
The first known use of groundwater was circa 1889

Rhymes for groundwater

See All Rhymes for groundwater

Browse Nearby Words

groundward
groundwater
groundwater level
See all Nearby Words

Cite this Entry

“Groundwater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/groundwater. Accessed 15 Aug. 2026.

Copy Citation

Kids Definition

groundwater

noun
ground·​wa·​ter ˈgrau̇n-ˌdwȯt-ər How to pronounce groundwater (audio)
-ˌdwät-
: water within the earth that supplies wells and springs

More from Merriam-Webster on groundwater

Nglish: Translation of groundwater for Spanish Speakers

Britannica.com: Encyclopedia article about groundwater

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Popular in Grammar & Usage

See More

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

7 Pairs of Commonly Confused Words

Is that lie 'bald-faced' or 'bold-faced'?

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?
See More

Popular in Wordplay

See More

Words from the 'Odyssey'

The Longest Long Words List

It's a Scorcher! Words for the Summer Heat

The Words of the Week - Aug. 14

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

Words from the 'Odyssey'

The Longest Long Words List
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
image of a green cube out of place in a lineup of red spheres
Odd Word Out: Synonyms Vol. 2 Quiz Figure out which word isn't like the others.
See All