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A hot spring that discharges intermittent jets of steam and water is called a geyser. Geysers are generally associated with recent volcanic activity. They are produced by the heating of underground waters that have come into contact with, or are very close to, magma. Geyser discharges as high as 1,600 ft (500 m) have been recorded, but 160 ft (50 m) is much more common. Occasionally, a geyser will adopt an extremely regular and predictable pattern of intermittent activity and discharge for a few minutes every hour or so (for example, Old Faithful in Yellowstone National Park).
Examples of geyser in a Sentence
Alex Perry, The Enquirer, 2 July 2025
Using innovative seismic imaging and advanced models, a team of researchers from Rice University, University of New Mexico, University of Utah and the University of Texas at Dallas have mapped the magmatic system beneath the steaming geysers and bubbling mud pots of Yellowstone National Park.
—David Bressan, Forbes.com, 26 Apr. 2025
This setting gives the country a diversity of geologic features, from massive faults to hot springs and geysers.
—Jack Knudson, Discover Magazine, 25 Apr. 2025
The new land is also expected to include a several water elements including a river, waterfalls and geysers, according to Disney's mockup of the site.
—Grace Harrington, People.com, 6 July 2025
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Cite this Entry
“Geyser.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geyser. Accessed 29 Jul. 2025.
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geyser
noun
from Icelandic Geyser "a hot spring in Iceland," from geysa "to rush forth"
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