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

In this case, indium arsenide (a semiconductor) and aluminum (a superconductor) are combined, cooled to near absolute zero and tuned with magnetic fields to achieve the state known as topological superconductivity. —New Atlas, 20 Feb. 2025

The technology is still in its early stages, and its hardware requires precise operating conditions, such as cryogenic cooling near absolute zero. —Jason Snyder, Forbes, 9 Jan. 2025

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

Word History

First Known Use

1798, in the meaning defined above

Rhymes for absolute zero

• biro
• spiro
• nonzero
• subzero
• superhero

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