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Noun: km/s
  1. A unit of speed equal to one thousand meters per second
    "Light travels in vacuum at the speed of almost 300,000 km/s.";
    - kilometers per second, kilometres per second
Noun: km
  1. A metric unit of length equal to 1000 meters (or 0.621371 miles)
    "We drove 500 kms to reach the coast";
    - kilometer [US], kilometre [Brit, Cdn], klick [informal]

Type of: metric linear unit, rate

Part of: mym [archaic], myriameter [US], myriametre [Brit, Cdn]

Encyclopedia: Km