Meaning of “deadly” in the English Dictionary

"deadly" in British English

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uk /ˈ us /ˈ

deadly adjective (VERY DANGEROUS)

B2 likely to cause death:

a deadly virus
a deadly weapon

More examples

  • Police found traces of the deadly biological agent Anthrax.
  • Doctors fear possible epidemics of cholera, malaria and other deadly diseases.
  • These missiles are capable of swatting enemy planes with deadly accuracy.
  • He is accused of helping to carry out a deadly bomb attack on a fashionable Paris restaurant.
  • The chemical attack was a deadly combination of nerve gases.


uk /ˈ us /ˈ

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

"deadly" in American English

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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)