AskDefine | Define insidiousness

Dictionary Definition



1 subtle and cumulative harmfulness (especially of a disease)
2 the quality of being designed to entrap

User Contributed Dictionary



  1. A surreptitious harmfulness, quality of entrapment, or treacherousness; the characteristic of being insidious.
    • 1900, Edith Wharton, The Touchstone, ch. 8,
      This lent a new insidiousness to his temptation, since her contempt would be a refuge from his own.


  • Webster 1828
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