Definition of geyser in US English:



  • 1A hot spring in which water intermittently boils, sending a tall column of water and steam into the air.

    • ‘At this series of erupting geysers in the north of the island, boiling water is expelled from the magma at the earth's core.’
    • ‘New Zealand's geographical features vary from the Southern Alps and fjords on South Island to the volcanoes, hot springs, and geysers on North Island.’
    • ‘Specialized microorganisms called extremophiles thrive in nuclear waste, volcanic vents, boiling geothermal geysers and even deep inside rocks.’
    • ‘Hot geysers and volcanic eruptions show this effect.’
    • ‘It is full of craters - it has thirty active volcanoes - hot springs, and geysers.’
    • ‘It is a startlingly brutal place where boiling geysers burst through mountain plains caked in salt, and jagged red rocks give way to massive sand dunes and desolate open salt flats.’
    • ‘Some of the hot springs are spouting springs or geysers, the most famous being Geysir in south Iceland.’
    • ‘‘It's one of the most spectacular tall geysers in the world,’ he says.’
    • ‘Rainwater in volcanic areas can descend as far as several kilometres into the crust, later rising to the surface in hot springs or geysers.’
    • ‘At times, the spring flows continuously; at other times it acts as a small geyser issuing a jet up to 70 cm in the air.’
    • ‘These were probably caused by volcanic eruptions or geysers.’
    • ‘For years we have seen evidence of water on Mars that includes geysers and liquid water.’
    • ‘Now there are plenty of places in the world where high temperatures come very close to the surface: volcanoes, and geysers and things like this come to mind immediately.’
    • ‘In fact 80 per cent of the country's electricity is generated from the natural heat of hot springs, geysers and volcanoes, which means very little pollution of any kind.’
    • ‘Gray hematite more quietly occupies the rims of hot springs and geysers where its presence often goes unnoticed.’
    • ‘Although no eruptions have been recorded at Yellowstone for 70,000 years, the hot springs, spectacular geysers, and bubbling mud pools provide testimony that hot magma still resides not far beneath the surface.’
    • ‘Precious metals are commonly precipitated with the siliceous sinters that form around hot springs and geysers.’
    • ‘The teenagers will visit many of Iceland's unique features, including geysers, volcanoes and geothermal hotspots.’
    • ‘In the highest resolution images, active geysers (ice volcanoes) were seen spewing columns of dark material many kilometers into the thin atmosphere.’
    • ‘So, hot springs are geysers on the sea floor, chemical rich environments.’
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    1. 1.1 A jet or stream of liquid.
      ‘the pipe sent up a geyser of sewer water into the street’
      • ‘Over centuries, these have carved out the natural limestone arch of Devil's Bridge, creating blowholes through which geysers of spouting surf crash with spectacular results.’
      • ‘Looking for all the world like a permanent feature of the museum's architectural program, his handsome project is centered by a geyser of steam piped from the Institute's heating plant.’
      • ‘A geyser of lava spouted between them and Seth attacked, charging through the lava like it was water, an unstoppable locomotive of power.’
      • ‘The car threw on its breaks and screeched against the pavement before ramming into a red fire hydrant, making a geyser of water spray into the air.’
      • ‘A maintenance brigade is repairing the rig, a geyser of steam and water shooting up into the air as they pull sections of pipe out of the ground.’
      • ‘His head was turned into atoms, and another geyser of a black liquid came from it's neck.’
      • ‘In a time where cars were noisy, smelly, rattling contraptions, prone to throwing tantrums and geysers of steam at the slightest pretext, this was like a chariot from heaven.’
      • ‘Well, they're a wonder to behold… great geysers of steam and water constantly erupting from the ground in every direction.’
      • ‘Suddenly, white geysers of water soared into the air.’
      • ‘At the last second a geyser of frigid water rushed up under him, swirling around and under him just strong enough to keep him from hitting the ground.’
      • ‘This second album erupts like a geyser of molten lava from your speakers.’
      • ‘When the baking soda is hot enough, you will see little geysers of steam and carbon dioxide which are fun to watch, but which spray powder around.’
      • ‘The center of the platform began to open like an iris and a geyser of flame spewed forth, engulfing its first breath of air.’
      • ‘There you are, looking 1,800 feet down, as the Atlantic Ocean slams into a sheer wall of rock, and the wind coming off the sea shoots a geyser of water straight up across the face of these rocks.’
      • ‘Poke the top with a fork, and a geyser of steam rises up.’
  • 2British A gas-fired water heater through which water flows as it is rapidly heated.

    • ‘People who want to have a well-equipped bathroom can look for instant geysers and water heaters, designer taps and other bathroom needs here.’


  • no object, with adverbial of direction (especially of water or steam) gush or burst out with great force.

    ‘yellow smoke geysered upward’
    • ‘Shouts and yells and crashes filled the air, ten times louder than in the hall, and it was difficult to see some places because of all the hissing steam, geysering up from spouts and funnels and pots.’


Late 18th century: from Icelandic Geysir, the name of a particular spring in Iceland; related to geysa ‘to gush’.