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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The ultimate vision for P2P, as it is nicknamed, is for a 65-mile trail that follows Clear Creek from the South Platte through Denver, Wheat Ridge, Golden, Idaho Springs and Georgetown, terminating at the headwaters on Loveland Pass. John Meyer, Denver Post, 11 Mar. 2026 The northernmost headwaters of the Florida Everglades, Shingle Creek flows from the city into nearby Lake Tohopekaliga, eventually reaching the Everglades. Elizabeth Rhodes, Travel + Leisure, 11 Mar. 2026 The good news, at least for the broader Colorado River and its headwaters in the Rockies, is that there are months to go before the book on Water Year 2026 snowfall and snowmelt closes in July. Brandon Loomis, AZCentral.com, 7 Mar. 2026 Upper Basin States—Colorado, New Mexico, Utah, and Wyoming—contain headwater tributaries and receive much of their water resources through snowmelt and runoff that drain above Lee’s Ferry. Outside, 3 Mar. 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 Mar. 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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