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

Princeton's WordNetRate this definition:4.3 / 3 votes

1. insidiousadjective

   beguiling but harmful

   "insidious pleasures"

2. insidiousadjective

   intended to entrap

3. insidious, pernicious, subtleadjective

   working or spreading in a hidden and usually injurious way

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

GCIDERate this definition:0.0 / 0 votes

1. Insidiousadjective

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

WiktionaryRate this definition:0.0 / 0 votes

1. insidiousadjective

   Producing harm in a stealthy, often gradual, manner.

2. insidiousadjective

   Intending to entrap; alluring but harmful

3. insidiousadjective

   Treacherous.

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

Samuel Johnson's DictionaryRate this definition:0.0 / 0 votes

1. INSIDIOUSadjective

   Sly; circumventive; diligent to entrap; treacherous.

   Etymology: insidieux, French; insidiosus, Latin.

   Since men mark all our steps, and watch our haltings, let a sense of their insidious vigilance excite us so to behave ourselves, that they may find a conviction of the mighty power of Christianity towards regulating the passions. Francis Atterbury, Sermons.

   They wing their course,
   And dart on distant coasts, if some sharp rock,
   Or shoal insidious, breaks not their career. James Thomson.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Insidiousadjective

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

2. Insidiousadjective

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

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

FreebaseRate this definition:1.0 / 1 vote

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 DictionaryRate this definition:5.0 / 1 vote

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. insidiosus—insidiæ, an ambush—insidēre—in, sedēre, to sit.]

Suggested ResourcesRate this definition:0.0 / 0 votes

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

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say insidious in sign language?

Numerology

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. Matthys Levy:

   Once deterioration like this starts, it's insidious, it just continues. Unless you do something about Champlain Towers South engineering firm, the whole thing is going to fall apart, all of the concrete is going to fall apart.

2. James Stewart:

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

3. Louis D. Brandeis:

   Experience should teach us to be most on our guard to protect liberty when the government's purposes are beneficial. The greatest dangers to liberty lurk in insidious encroachment by men of zeal, well meaning but without understanding.

4. 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.

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.

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