What does insidious mean?

Definitions for insidiousɪnˈsɪd i əs

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.


  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

Sample Sentences & Example Usage

  1. Murray McCully:

    It's the start of a lengthy process to try to stamp out such insidious activity.

  2. Shannon Watts:

    The gun lobby has been so insidious in this country in taking away the responsibilities that go along with gun rights.

  3. James Stewart:

    Fear is an insidious and deadly thing. It can warp judgment, freeze reflexes, breed mistakes. Worse, it's contagious.

  4. Percival:

    One hour of thoughtful solitude may nerve the heart for days of conflict - girding up its armor to meet the most insidious foe.

  5. 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.

Images & Illustrations of insidious

  1. insidiousinsidiousinsidious

Translations for insidious

From our Multilingual Translation Dictionary

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