Dictionary.com
Thesaurus.com

km

1 American  

abbreviation

  1. kilometer; kilometers.

km. 2 American  

abbreviation

  1. kilometer; kilometers.

  2. kingdom.

km 1 British  

abbreviation

  1. Comoros

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
km 2 British  

symbol

  1. kilometre

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
km Scientific  

  1. Abbreviation of kilometer

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Since geologists first identified the formation in 2002, the three kilometer wide crater and its surrounding ring of circular faults spanning about 20 km have sparked intense debate.

From Science Daily • Mar. 11, 2026

But in 2022 summer sea ice in much of Antarctica dramatically shrank, falling from an average of 2.8m sq km to a record low of 1.79m sq km in 2023.

From BBC • Feb. 25, 2026

Among this vehicle’s podium finishes: the 1957 Tour de France and the 1958 Buenos Aires 1000 km.

From The Wall Street Journal • Feb. 16, 2026

A newly published study in Nature describes the discovery of the first known Paranthropus fossil from Ethiopia's Afar region, uncovered about 1000 km north of where this ancient hominin had previously been found.

From Science Daily • Jan. 23, 2026

It could have been up to 10,000 km away.

From "The Martian" by Andy Weir

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.