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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
Joni Sweet, Forbes.com, 30 May 2025
While national park icons in the United States, such as the Old Faithful geyser in Wyoming and the Half Dome mountain in California, attract massive crowds, some of the most memorable experiences lie beyond the popular paths.
—Soo Kim, MSNBC Newsweek, 17 May 2025
The month before, a 19-year-old had third-degree burns over 5% of her body after visiting the Old Faithful geyser.
—Brooke Baitinger, Sacbee.com, 15 May 2025
Gather around the family pool to beat the Georgia heat with geysers and splashpads, or head to the lake to paddleboard, fish, kayak, try your hand at jet-skiing, or climb aboard a Double-Decker Tritoon with a slide.
—Lydia Mansel, Southern Living, 18 Apr. 2025
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Cite this Entry
“Geyser.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geyser. Accessed 9 Jun. 2025.
Copy CitationKids Definition
geyser
noun
from Icelandic Geyser "a hot spring in Iceland," from geysa "to rush forth"
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