deadly Meaning in the Cambridge English Dictionary Cambridge dictionaries logo

Meaning of “deadly” in the English Dictionary

"deadly" in British English

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deadlyadjective

uk   us   /ˈded.li/
  • deadly adjective (VERY DANGEROUS)

B2 likely to ​causedeath: a deadly ​virus a deadly ​weapon

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  • deadly adjective (COMPLETE)

complete or ​extreme: They have been deadly enemiesever since ​Markstole Greg's ​girlfriend.

deadlyadverb

uk   us   /ˈded.li/
C1 completely or ​extremely: I ​thought she was ​joking but she was deadly serious.
(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)
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