A scale of temperature beginning at absolute zero (−273.15°C or −459.67°F). Each degree, or kelvin, represents the same temperature increment as one degree on the Celsius scale. On the Kelvin scale water freezes at 273.15 K and boils at 373.15 K.
A scale for measuring temperature, with zero defined as absolute zero, with kelvins as the units (equivalent to degrees Celsius).
The Kelvin scale is the standard scale for many scientific fields, but the related Celsius scale is handier for everyday life on Earth.