- a waterfall in NW Wyoming, in Yellowstone National Park on the Yellowstone River
WordReference Random House Unabridged Dictionary of American English © 2026
Yel′lowstone Falls′,
- Place Namestwo waterfalls of the Yellowstone River, in Yellowstone National Park: upper falls, 109 ft. (33 m) high;
lower falls, 308 ft. (94 m) high.
Collins Concise English Dictionary © HarperCollins Publishers::
Yellowstone Falls pl n