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 maintain the delicate quantum states of their qubits, they must be cooled to near absolute zero—colder than outer space—using advanced cryogenic systems. —Sandy Carter, Forbes, 16 Dec. 2024

First, take a 15-kilogram bar of beryllium (or some similar material) and cool it almost all the way to absolute zero, the minimum possible temperature. —Charlie Wood, Quanta Magazine, 30 Oct. 2024

They're also designed to operate at cryogenic temperatures close to absolute zero (around minus 459 degrees Fahrenheit). —Kate Irwin, PCMAG, 23 Oct. 2024

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

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