Noun: km/s
- 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
- 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