Definition of "kilogram"

In the International System of Units, the base unit of mass; conceived of as the mass of one litre of water, but now defined by taking the fixed numerical value of the Planck constant .mw-parser-output .texhtml{font-family:"Nimbus Roman No9 L","Times New Roman",Times,serif;font-size:118%;line-height:1;white-space:nowrap;font-feature-settings:"lnum","tnum","kern"0;font-variant-numeric:lining-nums tabular-nums;font-kerning:none}.mw-parser-output .texhtml .texhtml{font-size:100%}h to be 6.626 070 15 × 10-34 when expressed in units of kg⋅m2⋅s−1. Symbol: kg  examples

(proscribed) The unit of weight such that a one-kilogram mass is also a one-kilogram weight.  examples