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
But with the help of significant backing from prominent right-wing donors who had made their fortunes in business, Turning Point stayed afloat and gained momentum with students across the nation.
—
Lily Mae Lazarus, Fortune, 20 Sep. 2025
Something tells us this is a trend that is only going to pick up momentum in London this weekend.
—Emma Spedding, Vogue, 19 Sep. 2025
Moor’s recent record adds to that momentum.
—Patrick Brzeski, HollywoodReporter, 19 Sep. 2025
In the absence of more concrete policy changes, legal experts said the argument that certain platforms could be held responsible for the sale of harmful products like counterfeit body lotion or faulty fire alarms is gaining momentum, even if they were technically sold by a third party.
—Gabrielle Fonrouge,paige Tortorelli, CNBC, 19 Sep. 2025
See All Example Sentences for momentum
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Lily Mae Lazarus, Fortune, 20 Sep. 2025
Something tells us this is a trend that is only going to pick up momentum in London this weekend.
—Emma Spedding, Vogue, 19 Sep. 2025
Moor’s recent record adds to that momentum.
—Patrick Brzeski, HollywoodReporter, 19 Sep. 2025
In the absence of more concrete policy changes, legal experts said the argument that certain platforms could be held responsible for the sale of harmful products like counterfeit body lotion or faulty fire alarms is gaining momentum, even if they were technically sold by a third party.
—Gabrielle Fonrouge,paige Tortorelli, CNBC, 19 Sep. 2025
See All Example Sentences for momentum
Cite this Entry
“Momentum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/momentum. Accessed 20 Sep. 2025.
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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