Fahrenheit |ˈfarənˌhīt| (abbr.: F)adjective [ 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.noun (also Fahrenheit scale)this scale of temperature.ORIGIN mid 18th cent.: named after Gabriel Daniel Fahrenheit (1686–1736), German physicist.