absolute zero

noun

: a theoretical temperature characterized by complete absence of heat and motion and equivalent to exactly −273.15°C or −459.67°F

Examples of absolute zero in a Sentence

Recent Examples on the Web

To perform quantum experiments, physicists typically have to put atoms in vacuums or subject them to temperatures near absolute zero. —Shayla Love, The Atlantic, 11 Oct. 2024

Like Luke Skywalker on Hoth cold–just a few degrees above absolute zero. —Alex Knapp, Forbes, 27 Sep. 2024

Scientific research shows that tardigrades, when in a tun state, can survive temperatures from just above absolute zero (-459.67°F or -272°C) to over 302°F. —Scott Travers, Forbes, 13 Sep. 2024

The researchers confined a cloud of around a million sodium atoms to a laser trap, at temperatures of a hair above absolute zero, and spun them around in circles super quickly. —Michael Irving, New Atlas, 11 Sep. 2024

Word History

First Known Use

1798, in the meaning defined above

Kids Definition

absolute zero

noun

: a hypothetical temperature that has never been reached, represents no heat at all, and is equal to approximately −273.15°C or −459.67°F

Medical Definition

absolute zero

noun

: a theoretical temperature characterized by complete absence of heat and equivalent to exactly −273.15°C or −459.67°F