Showing results for SI unit. Search instead for AC unit.

SI unit

British

noun

any of the units adopted for international use under the Système International d'Unités, now employed for all scientific and most technical purposes. There are seven fundamental units: the metre, kilogram, second, ampere, kelvin, candela, and mole; and two supplementary units: the radian and the steradian. All other units are derived by multiplication or division of these units without the use of numerical factors

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

SI unit Scientific

Any of the units of measure in the International System.
See more at International System

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"Like placing the thermostat closer to the AC unit," Ridgwell added.

From Science Daily • Dec. 21, 2025

She said she noticed the AC unit was not working when she tried to turn it on during the recent heat wave.

From Los Angeles Times • May 30, 2025

"We were still at, like, 102 in the cart," he told Grist, even with a portable AC unit and a fan running around the clock and with all the windows open.

From Salon • Aug. 29, 2023

While you can install a water heater on your own, it’s best to hire a professional when working with a furnace or AC unit.

From Seattle Times • Jan. 5, 2023

Ahead, an engine revved, an AC unit buzzed.

From "Legendary Frybread Drive-In" by Cynthia Leitich Smith

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023