An absolute system based on the meter, kilogram, and second; the basis of the International System of Units. ... (05 Mar 2000) ... 
(MKS) a system of measurements in which the units are based on the meter as the unit of length, the kilogram as the unit of mass, and the second as the unit of time.
Type: Term Definitions: 1. an absolute system based on the meter, kilogram, and second; the basis of the International System of Units.