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
Synonyms of atomic
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
Therefore, the present work supports the belief that rational materials design at both the macro and atomic levels can solve long-standing challenges, according to a press release.
—
Prabhat Ranjan Mishra, Interesting Engineering, 8 Nov. 2025
And as the nation marked the 80th anniversary in August of the atomic bombings of Hiroshima and Nagasaki, Japan, that marked the end of World War II, these veterans continue to fight for recognition — and to work with historians to preserve their stories.
—Hope Hodge Seck, USA Today, 6 Nov. 2025
The nonprofit was founded in 1945 by atomic scientists after World War II to advocate for international oversight of nuclear energy.
—Lim Hui Jie, CNBC, 30 Oct. 2025
However, if neutrinos and antineutrinos aren’t Dirac fermions but are actually Majorana particles, then an atomic nucleus that was unstable against double beta decay could actually exhibit two different types of double beta decay.
—Big Think, 28 Oct. 2025
See All Example Sentences for atomic
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Prabhat Ranjan Mishra, Interesting Engineering, 8 Nov. 2025
And as the nation marked the 80th anniversary in August of the atomic bombings of Hiroshima and Nagasaki, Japan, that marked the end of World War II, these veterans continue to fight for recognition — and to work with historians to preserve their stories.
—Hope Hodge Seck, USA Today, 6 Nov. 2025
The nonprofit was founded in 1945 by atomic scientists after World War II to advocate for international oversight of nuclear energy.
—Lim Hui Jie, CNBC, 30 Oct. 2025
However, if neutrinos and antineutrinos aren’t Dirac fermions but are actually Majorana particles, then an atomic nucleus that was unstable against double beta decay could actually exhibit two different types of double beta decay.
—Big Think, 28 Oct. 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 13 Nov. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share