momentum
noun
mo·men·tum
mō-ˈmen-təm 
mə-
plural momenta
mō-ˈmen-tə
mə-
or momentums
1
: a property (see property sense 1a) of a moving body that the body has by virtue of its mass (see mass entry 2 sense 1c) and motion and that is equal to the product of the body's mass and velocity
broadly
: a property of a moving body that determines the length of time required to bring it to rest when under the action of a constant force or moment
2
: strength or force gained by motion or by a series of events
The wagon gained momentum as it rolled down the hill.
Examples of momentum in a Sentence
The company has had a successful year and hopes to maintain its momentum by introducing new products.
The movie loses momentum toward the end.
Recent Examples on the Web
Isabel’s journey through the film is less a narrative of forward momentum than a path to political consciousness, with the act of clearly remembering the prerequisite to revolution or reform.
—
Patrick Brzeski, HollywoodReporter, 14 Feb. 2026
The experience was no doubt worthwhile as Zobac looks to build momentum ahead of Cactus League play.
—Jaylon Thompson, Kansas City Star, 14 Feb. 2026
But they’re also meant to build political momentum and legislative buy-in for a coming package of bills.
—Ben Christopher, Los Angeles Times, 14 Feb. 2026
North Crowley girls a favorite North Crowley (27-4, 12-0 District 3-6A) has the utmost momentum after sweeping through a tough district slate, which includes Boswell, the 2025 Class 6A Division II state champion.
—Charles Baggarly, Fort Worth Star-Telegram, 13 Feb. 2026
See All Example Sentences for momentum
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Patrick Brzeski, HollywoodReporter, 14 Feb. 2026
The experience was no doubt worthwhile as Zobac looks to build momentum ahead of Cactus League play.
—Jaylon Thompson, Kansas City Star, 14 Feb. 2026
But they’re also meant to build political momentum and legislative buy-in for a coming package of bills.
—Ben Christopher, Los Angeles Times, 14 Feb. 2026
North Crowley girls a favorite North Crowley (27-4, 12-0 District 3-6A) has the utmost momentum after sweeping through a tough district slate, which includes Boswell, the 2025 Class 6A Division II state champion.
—Charles Baggarly, Fort Worth Star-Telegram, 13 Feb. 2026
See All Example Sentences for momentum
Cite this Entry
“Momentum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/momentum. Accessed 16 Feb. 2026.
Copy CitationKids Definition
momentum
noun
mo·men·tum
mō-ˈment-əm
plural momenta
-ˈment-ə
or momentums
or momentums
1
: the characteristic of a moving body that is caused by its mass and its motion
2
Medical Definition
momentum
noun
mo·men·tum
mō-ˈment-əm, mə-ˈment-
plural momenta
-ˈment-ə
or momentums
or momentums
: a property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity
broadly
: a property of a moving body that determines the length of time required to bring it to rest when under the action of a constant force
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