noun · 2 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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Canada, US:/ˌnukliˈeɪʃən/
rhymes with -eɪʃən
CMU ARPABET:N UW2 K L IY0 EY1 SH AH0 N
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
The first stage of a phase transition in a small region.
Definition source: English Wiktionary via Wiktextract