a unit of mass equal to 1000 grams: the basic unit of mass in the International System of Units (SI), equal to the mass of the international prototype of the kilogram, a platinum-iridium cylinder kept in Sèvres, France. Abbreviation: kg
a unit of force and weight, equal to the force that produces an acceleration of 9.80665 meters per second per second when acting on a mass of one kilogram. Abbreviation: kg
Also, especially British,kilogramme.
Origin: 1790–1800; < Frenchkilogramme. See kilo-, -gram2