Definition of Deadly

1. Adjective. Causing or capable of causing death. "A mortal illness"

Exact synonyms: Deathly, Mortal
Similar to: Fatal
Derivative terms: Deadliness, Death

2. Adverb. As if dead.
Exact synonyms: Lifelessly
Partainyms: Dead, Lifeless

3. Adjective. Of an instrument of certain death. "A lethal injection"
Exact synonyms: Lethal
Similar to: Fatal
Derivative terms: Deadliness, Lethality

4. Adverb. (used as intensives) extremely. "Insanely jealous"
Exact synonyms: Deucedly, Devilishly, Insanely, Madly
Language type: Intensifier, Intensive

5. Adjective. Extremely poisonous or injurious; producing venom. "A virulent insect bite"
Exact synonyms: Venomous, Virulent
Similar to: Toxic
Derivative terms: Deadliness, Venom, Virulence

6. Adjective. Involving loss of divine grace or spiritual death. "The seven deadly sins"
Exact synonyms: Mortal
Category relationships: Divinity, Theology
Similar to: Unpardonable
Derivative terms: Deadliness

7. Adjective. Exceedingly harmful.
Exact synonyms: Baneful, Pernicious, Pestilent
Similar to: Noxious
Derivative terms: Deadliness, Perniciousness, Pestilence

8. Adjective. (of a disease) having a rapid course and violent effect.
Similar to: Virulent
Derivative terms: Deadliness

Definition of Deadly

1. a. Capable of causing death; mortal; fatal; destructive; certain or likely to cause death; as, a deadly blow or wound.

2. adv. In a manner resembling, or as if produced by, death.

Definition of Deadly

1. Adjective. (obsolete) Subject to death; mortal. ¹

2. Adjective. Causing death; lethal. ¹

3. Adjective. (context: by extension) very accurate (of aiming with a bow, firearm, etc.) ¹

4. Adjective. (informal) very boring ¹

5. Adjective. (informal) excellent, awesome, cool ¹

6. Adverb. (obsolete) Fatally, mortally. ¹

7. Adverb. In a way which suggests death. ¹

8. Adverb. Extremely. ¹

¹ Source:

Definition of Deadly

1. fatal [adj -LIER, -LIEST] - See also: fatal

Medical Definition of Deadly

1. 1. Capable of causing death; mortal; fatal; destructive; certain or likely to cause death; as, a deadly blow or wound. 2. Aiming or willing to destroy; implacable; desperately hostile; flagitious; as, deadly enemies. "Thy assailant is quick, skillful, and deadly." (Shak) 3. Subject to death; mortal. Deadly nightshade, a poisonous plant; belladonna. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Deadly

deadly (current term)
deadly agaric
deadly embrace
deadly embraces
deadly nightshade
deadly nightshades
deadly sin
deadly sins
deadman's brake
deadman's brakes

Literary usage of Deadly

Below you will find example usage of this term as found in modern and/or classical literature:

1. South Eastern Reporter by West Virginia Supreme Court of Appeals, West Publishing Company, South Carolina Supreme Court (1920)
"It was also error, ш that after all the evidence it out, the presumption of malice from the use of a deadly weapon fades from the case, and the jury must ..."

2. Nature by Norman Lockyer (1878)
"At the same time its deadly power is greatly diminished, and it occurred to Mr. Pedler that the poisonous properties of cobra virus might be diminished in a ..."

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