1
a
: of, relating to, or concerned with atoms
atomic physics
b
: nuclear sense 2
atomic energy
2
a
: marked by acceptance of the theory of atomism
3
: minute
4
of a chemical element
: existing in the state of separate atoms
Examples of atomic in a Sentence
made atomic adjustments to the clock's mechanism to keep it from whirring as it ran
Recent Examples on the Web
By protecting tungsten diselenide’s atomic-scale defects, the coating dramatically improved photon reliability.
—
Neetika Walter, Interesting Engineering, 3 Oct. 2025
Their model, called the M3GNet framework, accelerated simulations of molecular dynamics to evaluate properties of the materials such as atomic diffusivity.
—Andrew Moseman, IEEE Spectrum, 1 Oct. 2025
However, everything began to change toward the end of the 19th century, as a few discoveries truly began to challenge the conventional picture of atomic physics.
—Ethan Siegel, Big Think, 30 Sep. 2025
The exosphere is also the path by which the Earth is (very) slowly losing atomic hydrogen from water vapor lofted high into the atmosphere.
—Kyle Orland, ArsTechnica, 24 Sep. 2025
See All Example Sentences for atomic
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Neetika Walter, Interesting Engineering, 3 Oct. 2025
Their model, called the M3GNet framework, accelerated simulations of molecular dynamics to evaluate properties of the materials such as atomic diffusivity.
—Andrew Moseman, IEEE Spectrum, 1 Oct. 2025
However, everything began to change toward the end of the 19th century, as a few discoveries truly began to challenge the conventional picture of atomic physics.
—Ethan Siegel, Big Think, 30 Sep. 2025
The exosphere is also the path by which the Earth is (very) slowly losing atomic hydrogen from water vapor lofted high into the atmosphere.
—Kyle Orland, ArsTechnica, 24 Sep. 2025
See All Example Sentences for atomic
Cite this Entry
“Atomic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/atomic. Accessed 5 Oct. 2025.
Copy CitationKids Definition
atomic
adjective
atom·ic
ə-ˈtäm-ik 
1
: of, relating to, or concerned with atoms, atomic bombs, or nuclear energy
atomic physics
the atomic age
atomic energy
2
: extremely small
3
: found in the state of separate atoms
atomic hydrogen
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