Lexic.us

Definition of Insidious

1. Adjective. Beguiling but harmful. "Insidious pleasures"

2. Adjective. Intended to entrap.

3. Adjective. Working or spreading in a hidden and usually injurious way. "A subtle poison"

Definition of Insidious

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

Definition of Insidious

1. Adjective. Producing harm in a stealthy, often gradual, manner. ¹

2. Adjective. Intending to entrap; alluring but harmful ¹

3. Adjective. Treacherous. ¹

¹ Source: wiktionary.com

Definition of Insidious

1. [adj]

Medical Definition of Insidious

1. 1. Lying in wait; watching an opportunity to insnare or entrap; deceitful; sly; treacherous; said of persons; as, the insidious foe. "The insidious witch." 2. Intended to entrap; characterised by treachery and deceit; as, insidious arts. "The insidious whisper of the bad angel. " (Hawthorne) Insidious disease, a disease existing, without marked symptoms, but ready to become active upon some slight occasion; a disease not appearing to be as bad as it really is. Synonym: Crafty, wily, artful, sly, designing, guileful, circumventive, treacherous, deceitful, deceptive. Insid"iously, Insid"iousness. Origin: L. Insidiosus, fr. Insidiae an ambush, fr. Insidere to sit in; pref. In- + sedere to sit: cf. F. Insidieux. See Sit. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Insidious

inside track inside trading insidely insideness insider insider dealing insider information insider trading insiderdom insiderish

insiderism insiderness insiders insidery insides insidious (current term) insidiously insidiousness insidiousnesses insiduous

insight insight learning insightful insightfully insightfulness insightless insights insigne insignia insignia of rank

Other Resources: