nuclear

adjective

nu·cle·ar ˈnü-klē-ər

ˈnyü-

nonstandard -kyə-lər

Synonyms of nuclear next

: of, relating to, or constituting a nucleus

annexation of the suburban fringe by the nuclear metropolis—

W. H. Wickwar

: of or relating to the atomic nucleus

nuclear reaction

nuclear physics

: used in or produced by a nuclear reaction (such as fission)

nuclear fuel

nuclear waste

nuclear energy

c(1)

: being a weapon whose destructive power derives from an uncontrolled nuclear reaction

(2)

: of, produced by, or involving nuclear weapons

the nuclear age

nuclear war

(3)

: armed with nuclear weapons

nuclear powers

: of, relating to, or powered by nuclear energy

a nuclear submarine

the nuclear debate

a nuclear plant

How do you pronounce nuclear?: Usage Guide

Though disapproved of by many, pronunciations ending in \-kyə-lər\ have been found in widespread use among educated speakers including scientists, lawyers, professors, congressmen, U.S. cabinet members, and at least two U.S. presidents and one vice president. While most common in the U.S., these pronunciations have also been heard from British and Canadian speakers.

Phrases

go nuclear

informal

: to become wildly excited or upset : go berserk

To say the crowd went wild is an understatement. The crowd went nuclear. Outside the stadium, cars were overturned and fires were set. We sportswriters huddled inside, fearing for our lives.—

Tony Kornheiser

Examples of nuclear in a Sentence

Recent Examples on the Web

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.

All of the 193 governments that make up the U.N. have ambassadors who negotiate different U.N. agreements on issues ranging from terrorism to nuclear proliferation. —

Abiodun Williams, The Conversation, 16 Jan. 2025 Would the models be transferred to government hardware that was secure enough to test for their knowledge of classified information, like nuclear secrets or details of dangerous bioweapons? —

Billy Perrigo, TIME, 16 Jan. 2025 This involved Kazakhstan's nuclear resources company, Kazatomprom, and Russia's Rosatom transferring interests to Chinese entities, National Security News reported. —

Michael Gfoeller and David H. Rundell, Newsweek, 16 Jan. 2025 The subsequent permit for the nuclear tech will need to come from the US Nuclear Regulatory Commission. —

Michael Franco, New Atlas, 16 Jan. 2025 See all Example Sentences for nuclear