Deadly Definition

dĕdlē
deadlier, deadliest
adjective
deadlier, deadliest
Causing death or likely to cause death.
A deadly poison.
Webster's New World
Typical of death.
Deadly pallor.
Webster's New World
To the death; mortal or implacable.
Deadly combat, deadly enemies.
Webster's New World
Very harmful; destructive.
Webster's New World
Tending to take away vitality, effectiveness, or force.
The deadly habit of procrastination.
American Heritage
adverb
In a way suggestive of death.
To lie deadly still.
Webster's New World
To an extreme.
Deadly serious.
American Heritage
Extremely or excessively.
Deadly serious.
Webster's New World

Other Word Forms of Deadly

Adjective

Base Form:
deadly
Comparative:
deadlier
Superlative:
deadliest

Origin of Deadly

  • Old English dēadlīċ (adj.), dēadlīċe (adv.), corresponding to dead +‎ -ly. Cognate with Dutch dodelijk, German tödlich.

    From Wiktionary

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