Meaning of “deadly” in the English Dictionary

"deadly" in British English

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deadlyadjective

uk /ˈded.li/ us /ˈded.li/

deadlyadverb

uk /ˈded.li/ us /ˈded.li/

(Definition of “deadly” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"deadly" in American English

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deadlyadjective

us /ˈded·li/

deadly adjective (NOT LIVING)

dangerous and able to kill:

a deadly poison

(Definition of “deadly” from the Cambridge Academic Content Dictionary © Cambridge University Press)