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deadly

[ ded-lee ]
/ ˈdɛd li /
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See synonyms for: deadly / deadliest on Thesaurus.com

adjective, dead·li·er, dead·li·est.
adverb
in a manner resembling or suggesting death: deadly pale.
excessively; completely: deadly dull.
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Origin of deadly

First recorded before 900; Middle English deedli(ch), Old English dēadlīce; see dead, -ly

synonym study for deadly

1. See fatal.

OTHER WORDS FROM deadly

dead·li·ness, nounnon·dead·ly, adjective

WORDS THAT MAY BE CONFUSED WITH deadly

deadly , deathly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use deadly in a sentence

British Dictionary definitions for deadly

deadly
/ (ˈdɛdlɪ) /

adjective -lier or -liest
likely to cause deathdeadly poison; deadly combat
informal extremely boring
adverb, adjective
like death in appearance or certaintydeadly pale; a deadly sleep

Derived forms of deadly

deadliness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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