headwaters

plural of headwater
as in tributary
the beginning part of a stream 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

Synonyms & Similar Words

Relevance

Example Sentences

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.
Recent Examples of headwaters The headwaters of this 1,400-mile long artery are in the Rocky Mountains, fed by melting snowpack. Laura Paddison, CNN Money, 22 July 2026 Following an exceedingly warm year that has left the Colorado River’s headwaters in the Rocky Mountains largely snowless, Lake Mead is nearing a record-low level. Lila Seidman, Los Angeles Times, 16 July 2026 Its headwaters are in Indian River County, its mouth in the Atlantic near Jacksonville, which is the furthest place Sanders Fish House delivers its wild catch. Amy Drew Thompson, The Orlando Sentinel, 28 June 2026 Grinnell Glacier Trail, Glacier National Park, Montana Covering around a million acres, Glacier National Park provides the headwaters for streams that flow to the Pacific Ocean, the Gulf of Mexico, and the Hudson Bay. Stacey Leasca, Travel + Leisure, 26 June 2026 Lake Assinica in the Broadback headwaters has attracted world-wide attention for its giant squaretails the past two years. Marc Terziev, Outdoor Life, 25 June 2026 Long-term drought fueled by climate change has shrunk the Colorado River’s flows as federal officials and water leaders in the seven basin states — including Colorado, home to its headwaters — struggle to agree on longer-term plans for the river’s management. Elise Schmelzer, Denver Post, 21 June 2026 While the river’s headwaters are near Salem, most of the outfitters are located in Steelville. Kelsey Yandura, Midwest Living, 17 June 2026 These burn areas create barriers around villages, headwaters and sensitive sites, protecting them from wildfires during peak drought. ABC News, 7 June 2026
Recent Examples of Synonyms for headwaters
Noun
  • Presidio is protected by a series of berms and levees built in the 1970s and 1980s along the Rio Grande and tributaries to combat flooding.
    Rebecca Santana, Los Angeles Times, 4 Aug. 2026
  • Chesapeake Bay tributaries are important spawning areas, producing between 70% and 90% of the coastwide population of striped bass.
    Ken Perrotte, USA Today, 4 Aug. 2026
Noun
  • Instead, sources familiar with the situation pointed to Trump’s history of dropping past animosity with Republicans who appease him as one reason Pirro still has a shot of lasting beyond this week’s tenuous moment.
    Mabinty Quarshie, The Washington Examiner, 4 Aug. 2026
  • Recent research found that shoppers referred by large language models generate 53% more revenue per visit than shoppers arriving through non-AI sources, underscoring how quickly AI is becoming another front door to brands.
    Dani Mariano, Forbes.com, 4 Aug. 2026

Browse Nearby Words

Cite this Entry

“Headwaters.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/headwaters. Accessed 8 Aug. 2026.

More from Merriam-Webster on headwaters

Love words? Need even more definitions?

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

More from Merriam-Webster