Zero point on the absolute temperature scale; equal to -273.16 degrees C, or 0 degrees K (Kelvin), or -459.69 degrees F, or 0 degrees R (Rankine).

This is the point at which there is no energy (i.e., no molecular movement), which should serve as an indication for sane people to go elsewhere.

Loosely used to refer to the environmental conditions found in Finland during the winter months.

Sometimes used to accurately identify the temperature at which some ladies are able to "look daggers".