Yellowstone

American

[yel-oh-stohn] / ˈyɛl oʊˌstoʊn /

noun

a river flowing from NW Wyoming through Yellowstone Lake and NE through Montana into the Missouri River in W North Dakota. 671 miles (1,080 km) long.

Yellowstone British

/ ˈjɛləʊˌstəʊn /

noun

a river rising in N Wyoming and flowing north through Yellowstone National Park, then east to the Missouri. Length: 1080 km (671 miles)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"This work would not have been possible anywhere other than Yellowstone," said co-author and wildlife scientist John Marzluff of the University of Washington.

From Barron's • Mar. 12, 2026

As elk numbers declined in Yellowstone, cougars shifted their focus toward deer.

From Science Daily • Mar. 3, 2026

We got off in Jasper, the Yellowstone of Canada, filled with glaciers, craggy mountains, waterfalls, rivers and spectacular vistas.

From Los Angeles Times • Feb. 3, 2026

Also starring Yellowstone actress Kelly Reilly as a former detective, the six-part thriller will be released at the end of January.

From BBC • Jan. 29, 2026

Now bear that in mind, please, as we consider what a Yellowstone blast would do.

From "A Short History of Nearly Everything" by Bill Bryson

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023