First recorded in 1885–90, therm is from the Greek word thérmē heat
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The UK benchmark peaked briefly at almost 183p per therm on Thursday before easing back to 154.8p, an 11.3% increase from Wednesday's level.
From BBC • Mar. 19, 2026
British gas for immediate delivery was up 85 pence to 450 pence per therm at 0940 GMT, while the day-ahead contract rose 119 pence to 480 p/therm.
From Reuters • Aug. 22, 2022
In recent days, the price paid per therm of gas has reached above £4, compared with an average so far of £2.60.
From BBC • Jul. 5, 2022
British gas for next-day delivery has jumped 40% to 280p per therm.
From The Guardian • Feb. 24, 2022
Joule's Equivalent—J.—is the amount of energy equivalent to a therm or calorie, the metric unit of heat.
From The Story of Electricity by Munro, John
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
