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Definitions

nuclear

[noo-klee-er, nyoo-, -kyuh-ler] / ˈnu kli ər, ˈnyu-, -kyə lər /
ADJECTIVE
central
Synonyms
STRONGEST
basic essential fundamental important key paramount pivotal significant
STRONG
cardinal center chief dominant interior intermediate leading master mean median middle midway primary prime radical ruling salient umbilical
WEAK
axial centric centroidal equidistant focal foremost inmost inner mid middlemost midmost omphalic outstanding overriding predominant
Antonyms
STRONGEST
additional auxiliary extra inessential insignificant minor nonessential secondary trivial unimportant unsubstantial
STRONG
exterior extreme inferior outer outside subordinate
WEAK
peripheral
ADJECTIVE
inner
Synonyms
WEAK
close constitutional essential familiar focal inherent innermore inside interior internal intestinal intimate intrinsic inward
Antonyms
WEAK
exterior external outer outside physical
ADJECTIVE
organic
Synonyms
STRONGEST
biological
STRONG
anatomical constitutional essential fundamental integral living necessary original primary prime primitive principal
WEAK
amoebic animate basal biotic cellular elemental inherent innate live plasmic structural vital
Antonyms
STRONG
accessory auxiliary extra inessential minor secondary trivial unimportant unnecessary
WEAK
inorganic man-made unnatural

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Missing nuclear official becomes 10th tied to U.S. secrets.

From MarketWatch • Apr. 15, 2026

Article II of the NPT bans the manufacture and acquisition of nuclear explosive devices, but lacks any enforcement features.

From The Wall Street Journal • Apr. 14, 2026

Tuesday’s guidance stipulates that various federal agencies will establish cost-effective partnerships with private-sector companies to deploy nuclear reactors in orbit “as early as 2028” and on the Moon by 2030.

From Barron's • Apr. 14, 2026

That uranium could be quickly enriched to reach weapons-grade, but the country does not currently possess a nuclear weapon.

From BBC • Apr. 14, 2026

Its large size makes the nucleus of uranium 235 unstable—to break it apart, all nuclear operators need to do is add some loose neutrons to the mix.

From "Meltdown" by Deirdre Langeland

Vocabulary lists containing nuclear

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