Definition that contains one thousand
- ma one thousandth of an ampere
- kilo one thousand grams; the basic unit of mass adopted under the Systeme International d'Unites
- kg one thousand grams; the basic unit of mass adopted under the Systeme International d'Unites
- kc one thousand periods per second
- mg one thousandth (1/1,000) gram
- milligram one thousandth (1/1,000) gram
- kilogram one thousand grams; the basic unit of mass adopted under the Systeme International d'Unites
- millisecond one thousandth (10^-3) of a second
- kiloton one thousand tons
- kilohertz one thousand periods per second