What does insidious mean?

Definitions for insidious
ɪnˈsɪd i əsin·sid·i·ous

Here are all the possible meanings and translations of the word insidious.

Princeton's WordNet

  1. insidious(adj)

    beguiling but harmful

    "insidious pleasures"

  2. insidious(adj)

    intended to entrap

  3. insidious, pernicious, subtle(adj)

    working or spreading in a hidden and usually injurious way

    "glaucoma is an insidious disease"; "a subtle poison"


  1. Insidious(a.)

    Acting or proceeding unobserved or in a seemingly harmless manner, but slowly or eventually doing great damage; as, an insidious disease; an insidious plot.

  2. Origin: [L. insidiosus, fr. insidiae an ambush, fr. insidere to sit in; pref. in- + sedere to sit: cf. F. insidieux. See Sit.]


  1. insidious(Adjective)

    Producing harm in a stealthy, often gradual, manner.

  2. insidious(Adjective)

    Intending to entrap; alluring but harmful

  3. insidious(Adjective)


  4. Origin: From insidiosus, from insidiae + -osus, from insideo, from in + sedeo.

Webster Dictionary

  1. Insidious(adj)

    lying in wait; watching an opportunity to insnare or entrap; deceitful; sly; treacherous; -- said of persons; as, the insidious foe

  2. Insidious(adj)

    intended to entrap; characterized by treachery and deceit; as, insidious arts

  3. Origin: [L. insidiosus, fr. insidiae an ambush, fr. insidere to sit in; pref. in- + sedere to sit: cf. F. insidieux. See Sit.]


  1. Insidious

    Insidious is the 5th full-length album by Mephisto Walz. All the tracks on this album were arranged, recorded, mixed, written and produced by Barry Galvin. Christianna provided the vocals and David Glass supplied some of the drums for this album.

Chambers 20th Century Dictionary

  1. Insidious

    in-sid′i-us, adj. watching an opportunity to ensnare: intended to entrap: deceptive: advancing imperceptibly: treacherous.—adv. Insid′iously.—n. Insid′iousness. [L. insidiosusinsidiæ, an ambush—insidērein, sedēre, to sit.]

Suggested Resources

  1. insidious

    Song lyrics by insidious -- Explore a large variety of song lyrics performed by insidious on the Lyrics.com website.

How to pronounce insidious?

  1. Alex
    US English

How to say insidious in sign language?

  1. insidious


  1. Chaldean Numerology

    The numerical value of insidious in Chaldean Numerology is: 4

  2. Pythagorean Numerology

    The numerical value of insidious in Pythagorean Numerology is: 2

Examples of insidious in a Sentence

  1. Wendy Young:

    I fear that one of the insidious agenda items here is for the administration to jettison the protections... all the policies and procedures we built up over the years to protect the children in the system, we were starting to get there and then under this administration -- a system that has taken us 30 years to build, it's taken them three months to tear down.

  2. Avielle Foundation:

    Jeremy Richman was deeply devoted to supporting research into brain abnormalities that are linked to abnormal behavior and to promoting brain health. Tragically, Jeremy Richman death speaks to how insidious and formidable a challenge brain health can be and how critical it is for all of us to seek help for ourselves, our loved ones and anyone who we suspect may be in need, jeremy's mission will be carried on by the many who love Jeremy Richman, including many who share the heartache and trauma that Jeremy Richman has suffered since December 14, 2012. We are crushed to pieces, but this important work will continue, because, as Jeremy Richman would say, we have to.

  3. Louis Penner:

    The insidious thing about implicit racial bias is that it occurs among physicians who believe they're not racist, but patients pick up on it and (it) affects how they feel about the treatment.

  4. Lucius Annaeus Seneca:

    Conversation has a kind of charm about it, an insuating and insidious something that elicits secrets from us just like love or liquor.

  5. Brian Eno:

    I'm struck by the insidious, computer-driven tendency to take things out of the domain of muscular activity and put them into the domain of mental activity. The transfer is not paying off. Sure, muscles are unreliable, but they represent several million years of accumulated finesse.

Images & Illustrations of insidious

  1. insidiousinsidiousinsidiousinsidiousinsidious

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Translations for insidious

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"insidious." Definitions.net. STANDS4 LLC, 2020. Web. 6 Apr. 2020. <https://www.definitions.net/definition/insidious>.

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