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• newton
  newton

  noun

  the standard unit of force in the International System of Units (SI), equal to the force that produces an acceleration of one meter per second per second on a mass of one kilogram. N
• Newton
  Newton

  noun

  Sir Isaac, 1642–1727, English philosopher and mathematician: formulator of the law of gravitation.

newton

¹ American  

[noot-n, nyoot-n] / ˈnut n, ˈnyut n /

noun

Physics.

1. the standard unit of force in the International System of Units (SI), equal to the force that produces an acceleration of one meter per second per second on a mass of one kilogram. N

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Newton ² American  

[noot-n, nyoot-n] / ˈnut n, ˈnyut n /

noun

1. Sir Isaac, 1642–1727, English philosopher and mathematician: formulator of the law of gravitation.

2. a city in eastern Massachusetts, near Boston.

3. a city in central Kansas.

4. a city in central Iowa, east of Des Moines.

5. a male given name: a family name taken from a placename meaning “new town.”

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Newton ¹ British  

/ ˈnjuːtən /

noun

1. one of the deepest craters on the moon, over 7300 m deep and about 112 km in diameter, situated in the SE quadrant

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Newton ² British  

/ ˈnjuːtən /

noun

1. Sir Isaac . 1642–1727, English mathematician, physicist, astronomer, and philosopher, noted particularly for his law of gravitation, his three laws of motion, his theory that light is composed of corpuscles, and his development of calculus independently of Leibnitz. His works include Principia Mathematica (1687) and Opticks (1704)

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newton ³ British  

/ ˈnjuːtən /

noun

1.  N.  the derived SI unit of force that imparts an acceleration of 1 metre per second to a mass of 1 kilogram; equivalent to 10 ⁵ dynes or 7.233 poundals

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newton ¹ Scientific  

/ no̅o̅t′n /

1. The SI derived unit used to measure force. One newton is equal to the force needed to accelerate a mass of one kilogram one meter per second per second.

2. See also joule

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Newton ² Scientific  

1. English mathematician and scientist. He invented a form of calculus and formulated principles of physics that remained basically unchallenged until the work of Albert Einstein, including the law of universal gravitation, a theory of the nature of light, and three laws of motion. His treatise on gravitation, presented in Principia Mathematica (1687), was in his own account inspired by the sight of a falling apple.

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Etymology

Origin of newton

First recorded in 1900–05; after I. Newton

Explanation

A newton is a unit of force that will accelerate one kilogram of mass one meter per second squared. Just as meters measure distance, newtons measure force. The newton is named for Isaac Newton, the famous physicist. This can help you remember that newton is an important term in physics. For the International System of Units, the newton is a unit of force that could give one kilogram of mass a specific amount of acceleration: one meter per second per second. You can also say a newton is equal to the force of 100,000 dynes. Using newtons makes measuring forces, such as gravity, simpler and easier.

Example Sentences

“My SPX cycle composite projected a peak right around current levels and has now rolled over, turning negative between now and at least late July with the risk of lower prices into October,” Newton said.

From MarketWatch • Jun. 9, 2026

Riordan was a moderate, easygoing philanthropist, Newton said, and Republicans at the time made up 30% of L.A.’s registered voters, double their number now.

From Los Angeles Times • May 31, 2026

Moloney asked: "You didn't ultimately contact Ms Newton. Do you know what Elaine Newton does for a living?"

From BBC • May 27, 2026

Researchers have spent more than 225 years trying to improve measurements of big G since Isaac Newton first described gravity mathematically.

From Science Daily • May 18, 2026

With each step my determination persisted to raise a ton of money for Operation Save Sir Fig Newton.

From "Sir Fig Newton and the Science of Persistence" by Sonja Thomas