What does deadly mean?

Definitions for deadly
ˈdɛd lidead·ly

This dictionary definitions page includes all the possible meanings, example usage and translations of the word deadly.

Princeton's WordNet

  1. deadly, deathly, mortaladjective

    causing or capable of causing death

    "a fatal accident"; "a deadly enemy"; "mortal combat"; "a mortal illness"

  2. deadly, lethaladjective

    of an instrument of certain death

    "deadly poisons"; "lethal weapon"; "a lethal injection"

  3. deadly, venomous, virulentadjective

    extremely poisonous or injurious; producing venom

    "venomous snakes"; "a virulent insect bite"

  4. deadly, mortal(a)adjective

    involving loss of divine grace or spiritual death

    "the seven deadly sins"

  5. baneful, deadly, pernicious, pestilentadjective

    exceedingly harmful

  6. deadlyadverb

    (of a disease) having a rapid course and violent effect

  7. deadly, lifelesslyadverb

    as if dead

  8. madly, insanely, deadly, deucedly, devilishlyadverb

    (used as intensives) extremely

    "she was madly in love"; "deadly dull"; "deadly earnest"; "deucedly clever"; "insanely jealous"


  1. deadlyadverb

    Fatally, mortally.

  2. deadlyadverb

    In a way which suggests death.

    Her face suddenly became deadly white.

  3. deadlyadverb


  4. deadlyadjective

    Subject to death; mortal.

  5. deadlyadjective

    Causing death; lethal.

  6. deadlyadjective

    very accurate (of aiming with a bow, firearm, etc.)

  7. deadlyadjective

    very boring

  8. deadlyadjective

    excellent, awesome, cool

  9. Etymology: deadlic (adj.), deadlice (adv.), corresponding to. Cognate with Dutch dodelijk, German tödlich.

Samuel Johnson's Dictionary

  1. Deadlyadjective

    Etymology: from dead.

    She that herself will shiver and disbranch
    From her material sap, perforce must wither,
    And come to deadly use. William Shakespeare, King Lear.

    She then on Romeo calls,
    As if that name,
    Shot from the deadly level of a gun,
    Did murther her. William Shakespeare, Romeo and Juliet.

    Dry mourning will decay more deadly bring,
    As a North wind burns a too forward Spring;
    Give sorrow vent, and let the sluices go. John Dryden, Aurengb.

    The Numidians, in number infinite, are deadly enemies unto the Turks. Richard Knolles, History of the Turks.

  2. Deadlyadverb

    Like dumb statues, or unbreathing stones,
    Star’d each on other, and look’d deadly pale. William Shakespeare, R. III.

    Young Arcite heard, and up he ran with haste,
    And ask’d him why he look’d so deadly wan. John Dryden, Fables.

    I will break Pharaoh’s arms, and he shall groan before him with the groanings of a deadly wounded man. Ez. xxx. 24.

    Mettled schoolboys set to cuff,
    Will not confess that they have done enough,
    Though deadly weary. Orrery.

    John had got an impression, that Lewis was so deadly cunning a man, that he was afraid to venture himself alone with him. John Arbuthnot, History of John Bull.


  1. deadly

    Deadly refers to something that is likely to cause or is capable of causing death; lethal, fatal, or life-threatening. It can also refer to something highly dangerous, ominous or with adverse effects. In a figurative or casual sense, it can imply something extremely accurate, effective or skillful.

Webster Dictionary

  1. Deadlyadjective

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

  2. Deadlyadjective

    aiming or willing to destroy; implacable; desperately hostile; flagitious; as, deadly enemies

  3. Deadlyadjective

    subject to death; mortal

  4. Deadlyadverb

    in a manner resembling, or as if produced by, death

  5. Deadlyadverb

    in a manner to occasion death; mortally

  6. Deadlyadverb

    in an implacable manner; destructively

  7. Deadlyadverb



  1. Deadly

    Deadly! is a series of children's books written by Morris Gleitzman and Paul Jennings first published in 2000.

How to pronounce deadly?

How to say deadly in sign language?


  1. Chaldean Numerology

    The numerical value of deadly in Chaldean Numerology is: 9

  2. Pythagorean Numerology

    The numerical value of deadly in Pythagorean Numerology is: 6

Examples of deadly in a Sentence

  1. Rob Portman:

    I'm pleased to see that they are finally taking some actions to secure our border – now is not the time to incentivize unlawful migration or the influx of deadly fentanyl by continuing their failed policies, i call on the Biden administration to install the technology Border Patrol needs to complete their mission, close all the gaps in the border wall, and to implement policies to curb the influx of unlawful migrants and illicit narcotics.

  2. Mariana Fulger:

    Too strong of a light can be deadly to the one used to read by candlelight.

  3. Richard Matt:

    We're going to dip these in AIDS blood, and we'll put a patent on them, we'll sell them as deadly weapons.

  4. Randy Grossman:

    We have to educate our teachers. We have to institute to educate friends and family, to let people know really how deadly this this this drug is, it's both an aggressive prosecution strategy and also an equally aggressive education and prevention strategy.

  5. Flavia Tomello Tsialas:

    CLICK HERE TO GET THE FOX NEWS APP Tsialas said Flavia Tomello Tsialas now hopes Flavia Tomello Tsialas sons death will inspire a cultural change at U.S.universities. I would like to see these deadly traditions and primitive practices be forever removed out of our colleges, so that hazing deaths do not occur in the future, i hope that this tragedy will force schools to create an environment for students to grow not only in knowledge, but also in love, inclusion and compassion.

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Translations for deadly

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"deadly." Definitions.net. STANDS4 LLC, 2024. Web. 17 May 2024. <https://www.definitions.net/definition/deadly>.

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    an outward bevel around a door or window that makes it seem larger
    A splay
    B lacerate
    C tenebrous
    D commensal

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