abbreviation.
Symbol for the kilometer (kilometre), an SI unit of length equal to 103 meters (metres).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a metric unit of length equal to 1000 meters (or 0.621371 miles)
Word Usage
"The mine has been in production since 1906, and has resulted in the creation of a pit over 0.75 mile (1.2 km) deep, 2.5 miles (4 km) wide, and covering 1900 acres (7.7 km²)."