■ noun
1》 'gi:zə , 'gʌɪ- a hot spring in which water intermittently boils, sending a tall column of water and steam into the air.
2》 'gi:zə Brit. a gas-fired water heater through which water flows as it is rapidly heated.
Origin
C18: from Icelandic Geysir , the name of a particular spring in Iceland; related to geysa 'to gush'.