temperature - the degree of hotness or coldness of a body or environment (corresponding to its molecular activity)absolute zero - (cryogenics) the lowest temperature theoretically attainable (at which the kinetic energy of atoms and molecules is minimal); 0 Kelvin or -273.15 Centigrade or -459.67 Fahrenheit dew point - the temperature at which the water vapor in the air becomes saturated and condensation begins flash point, flashpoint - the lowest temperature at which the vapor of a combustible liquid can be ignited in air boiling point, boil - the temperature at which a liquid boils at sea level; "the brought to water to a boil" mercury - temperature measured by a mercury thermometer; "the mercury was falling rapidly" simmer - temperature just below the boiling point; "the stew remained at a simmer for hours" blood heat, body temperature - temperature of the body; normally 98.6 F or 37 C in humans; usually measured to obtain a quick evaluation of a person's health low temperature, cold, coldness - the absence of heat; "the coldness made our breath visible"; "come in out of the cold"; "cold is a vasoconstrictor" |