Kilometre has 2 different meanings across 1 category:
Noun
a metric unit of length equal to 1000 meters (or 0.621371 miles)
(metrology) An SI unit of length equal to 10³ metres. Symbol: km
The word kilometre comes from the French kilomètre, which was borrowed from Ancient Greek. It combines the words for "thousand" and "measure" to mean a thousand meters.