kilometer
noun
How do you pronounce kilometer?: Usage Guide
In North American speech kilometer is most often pronounced with primary stress on the second syllable. This pronunciation is also heard frequently in British speech. Those who object to second syllable stress say that the first syllable should be stressed in accord with the stress patterns of centimeter, millimeter, etc. However, the pronunciation of kilometer does not parallel that of other metric compounds. From 1828 to 1841 Noah Webster indicated only second syllable stress, and his successor added a first syllable stress variant in the first Merriam-Webster dictionary of 1847. Thus, both pronunciations are venerable. Most scientists use second syllable stress, although first syllable stress seems to occur with a higher rate of frequency among scientists than among nonscientists.
Did you know?
A kilometer is equal to about 62/100 of a mile, and a mile is equal to about 1.61 kilometers. The U.S. has been slow to adopt metric measures, which are used almost everywhere else in the world. Though our car speedometers are often marked in both miles and kilometers, the U.S. and Great Britain are practically the only developed nations that still show miles rather than kilometers on their road signs. But even in the U.S., footraces are usually measured in meters or kilometers, like the Olympic races. Runners normally abbreviate kilometer to K: "a 5K race" (3.1 miles), "the 10K run" (6.2 miles), and so on.
Examples of kilometer in a Sentence
Christopher McFadden, Interesting Engineering, 25 Apr. 2026
An Associated Press journalist in Bamako heard sustained heavy weapons and automatic rifle gunfire coming from Modibo Keïta International Airport, around 15 kilometers (9 miles) from the city center, and saw a helicopter over nearby neighborhoods.
—ABC News, 25 Apr. 2026
That’s roughly the mass of a smallish rocky asteroid, perhaps four or five kilometers in diameter.
—Phil Plait, Scientific American, 24 Apr. 2026
In Khiam, about 5 kilometers north of the border, swathes of green have turned brown after Israeli earthwork.
—Zeena Saifi, CNN Money, 24 Apr. 2026
See All Example Sentences for kilometer
Cite this Entry
“Kilometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/kilometer. Accessed 28 Apr. 2026.
Copy CitationKids Definition
kilometer
noun
kil-ˈäm-
Medical Definition
kilometer
noun
