headwater

noun

head·​wa·​ter ˈhed-ˌwȯ-tər How to pronounce headwater (audio)
-ˌwä-
Synonyms of headwaternext
: the source of a stream
usually used in plural

Examples of headwater in a Sentence

the first exploration of the Missouri River from its mouth to its headwaters was made by Meriwether Lewis and William Clark in the early 1800s
Recent Examples on the Web
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Previous spills in Flint River The headwaters of the Flint River, which flows south all the way to Florida, begin from seepage around the area of the Atlanta airport, meaning any contaminants from that area can reach the river more easily. Irene Wright, USA Today, 6 Feb. 2026 The Flint River — whose headwaters begin in East Point as a small stream — flows through pipes under the airport and emerges as a larger stream on the south side of the airfield. Nick Caloway, CBS News, 3 Feb. 2026 Record-low snowpack in the Colorado River headwaters in central and northern Colorado suggests nature is unlikely to give negotiators breathing room. Elise Schmelzer, Denver Post, 15 Jan. 2026 Because of the mine’s location — at the headwaters of the BWCA — any potential pollution or acid mine drainage would likely flow into the wilderness area, Voyageurs National Park, and Canada’s Quetico Provincial Park. Alex Robinson, Outdoor Life, 15 Jan. 2026 See All Example Sentences for headwater

Word History

First Known Use

1612, in the meaning defined above

Time Traveler
The first known use of headwater was in 1612

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Cite this Entry

“Headwater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/headwater. Accessed 14 Feb. 2026.

Kids Definition

headwater

noun
head·​wa·​ter -ˌwȯt-ər How to pronounce headwater (audio)
-ˌwät-
: the beginning and upper part of a stream
usually used in plural
Last Updated: - Updated example sentences
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