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deadly

[ded-lee] /ˈdɛd li/
adjective, deadlier, deadliest.
1.
causing or tending to cause death; fatal; lethal:
a deadly poison.
2.
aiming to kill or destroy; implacable:
a deadly enemy.
3.
like death:
a deadly pallor.
4.
excruciatingly boring:
The dinner party was absolutely deadly.
5.
excessive; inordinate:
deadly haste.
6.
extremely accurate:
Annie Oakley was a deadly shot.
adverb
7.
in a manner resembling or suggesting death:
deadly pale.
8.
excessively; completely:
deadly dull.
Origin of deadly
900
before 900; Middle English deedli(ch), Old English dēadlīce. See dead, -ly
Related forms
deadliness, noun
nondeadly, adjective
Can be confused
deadly, deathly.
Synonyms
1. See fatal. 4. dull, tedious, tiresome.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for deadlier
Contemporary Examples
Historical Examples
  • There's no such thing as a weapon too horrible to use; weapons will continue to become bigger, and deadlier.

    Irresistible Weapon Horace Brown Fyfe
  • No deadlier instrument was ever invented by the cruelty of man.

  • (And who shall tell this deed of hell, how deadlier far a curse it is Than even pulling temples down and burning universities)?

  • "A rusty sword is all the deadlier, when it once gets in," said the Goat-Lieutenant.

    Soap-Bubble Stories Fanny Barry
  • Greater knowledge of chemistry means industrial advancement and also deadlier poison gases.

    Behind the Mirrors Clinton W. Gilbert
  • Or might it be that tribe of still darker, deadlier fame—the hostile Arapaho?

    The Wild Huntress Mayne Reid
  • "A deadlier viper than that never lived in the bush," said Waters, as he watched her.

    Old Broadbrim Into the Heart of Australia Author of "Old Broadbrim"
British Dictionary definitions for deadlier

deadly

/ˈdɛdlɪ/
adjective -lier, -liest
1.
likely to cause death: deadly poison, deadly combat
2.
(informal) extremely boring
adverb, adjective
3.
like death in appearance or certainty: deadly pale, a deadly sleep
Derived Forms
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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Word Origin and History for deadlier

deadly

adj.

Old English deadlic "mortal, subject to death," also "causing death;" see dead + -ly (1). Meaning "having the capacity to kill" is from late 14c. (Old English words for this included deaðbærlic, deaðberende).

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for deadlier

deadly

adjective

  1. Boring; extremely tedious; dull as death itself: I came prepared for a long and deadly meeting (1300+)
  2. Excellent; admirable; cool (1940s+ Swing talk)

adverb

Extremely: She is deadly serious about it (1300+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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