Definition of Fahrenheit in English:


(also F)


  • postpositive when used with a numeral Of or denoting a scale of temperature on which water freezes at 32° and boils at 212° under standard conditions.

    ‘the temperature was steady at 65° Fahrenheit’
    • ‘The students exercised in cold water of 68 degrees Fahrenheit and warm water of 91.4 degrees Fahrenheit.’
    • ‘If you heat up water to 212 degrees Fahrenheit, depending on pressure and so forth, it boils.’
    • ‘Temperatures can vary from freezing to 130 degrees Fahrenheit, making daily duties difficult.’
    • ‘Water boils at 212 degrees Fahrenheit, or 100 degrees Celsius.’
    • ‘The tests included temperatures as cold as minus 112 degrees Fahrenheit to simulate the conditions of open space.’


  • The Fahrenheit scale of temperature.

    • ‘However, a sunny 95-degree Fahrenheit spike can slash months of savings in a single eight-hour day.’
    • ‘Likewise, we can measure temperatures on the Celsius or Fahrenheit scales.’
    • ‘The original zero point of the Fahrenheit temperature scale was set at the lowest temperature that could be reached in a mixture of salt and ice.’
    • ‘Looking out through a world in reverse, he wrote in grease pencil the Fahrenheit temperatures backwards for us on the other side of the glass.’
    • ‘The Fahrenheit and Celsius scales are based on two fixed points, the Kelvin and Rankine scales are based on one.’


Mid 18th century: named after Gabriel Daniel Fahrenheit (1686–1736), German physicist.