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geyser

American  
[gahy-zer, -ser, gee-zer] / ˈgaɪ zər, -sər, ˈgi zər /

noun

  1. a hot spring that intermittently sends up fountainlike jets of water and steam into the air.

  2. British Informal. a hot-water heater, as for a bath.


verb (used without object)

  1. to spew forth as or like a geyser.

    the kettle geysering all over the stove.

geyser British  
/ ˈɡiːzə, ˈɡaɪzər /

noun

  1. a spring that discharges steam and hot water

  2. a domestic gas water heater

"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

geyser Scientific  
/ gīzər /
  1. A natural hot spring that regularly ejects a spray of steam and boiling water into the air.


Other Word Forms

  • geyseral adjective
  • geyseric adjective

Etymology

Origin of geyser

1755–65; < Icelandic Geysir name of a hot spring in Iceland, literally, gusher, derivative of geysa to gush

Explanation

A geyser is a spring that dramatically spews hot water and steam — Old Faithful in Yellowstone National Park is one of the most famous. When a geyser explodes, hot water and steam shoot up out of the ground like some kind of crazy fountain. It's so amazing that people often use this word to describe things that remind them of geysers. If you suddenly make a lot of money, you hit a geyser. If someone is crying uncontrollably, that's a geyser of emotion. If you're writing quickly and well, it feels like a geyser of words. Anything powerfully flowing could be considered a geyser.

Keep Reading on Vocabulary.com

Vocabulary lists containing geyser

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.

The geyser was capped about two weeks later.

From The Wall Street Journal • Dec. 26, 2025

The geyser was capped about two weeks later.

From The Wall Street Journal • Dec. 26, 2025

In 1871 Jackson took one of the first photographs of the Old Faithful geyser in the Yellowstone region of Wyoming.

From The Wall Street Journal • Nov. 7, 2025

Meghan is a wealthy American woman living a royal dream, if you ignore the geyser of British tabloid bile constantly burbling in the background of her life.

From Salon • Aug. 27, 2025

Nico stumbled back as the arrow burst into a geyser of flame.

From "The House of Hades" by Rick Riordan