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
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
After the Holocaust and the atomic bombing of Hiroshima and Nagasaki, Jewish and Japanese writers documented some survivors’ apprehensions about giving birth.
—
Jack Jiang, The Conversation, 8 Jan. 2025
Uranium miners laid siege to the landscape during the early atomic age, and in the decades since, many dwellings and graves have been looted.
—Ross Andersen, The Atlantic, 7 Jan. 2025
In November, Putin signed a decree which changed Russia's nuclear doctrine, lowering the threshold for atomic weapons use.
—Dan Perry, Newsweek, 4 Jan. 2025
At an atomic scale, doping substitutes atoms of a host metal with foreign atoms.
—Ars Technica, 2 Jan. 2025
See all Example Sentences for atomic 
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Jack Jiang, The Conversation, 8 Jan. 2025
Uranium miners laid siege to the landscape during the early atomic age, and in the decades since, many dwellings and graves have been looted.
—Ross Andersen, The Atlantic, 7 Jan. 2025
In November, Putin signed a decree which changed Russia's nuclear doctrine, lowering the threshold for atomic weapons use.
—Dan Perry, Newsweek, 4 Jan. 2025
At an atomic scale, doping substitutes atoms of a host metal with foreign atoms.
—Ars Technica, 2 Jan. 2025
See all Example Sentences for atomic
Dictionary Entries Near atomic
Cite this Entry
“Atomic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/atomic. Accessed 18 Jan. 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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