Pronunciation: (in-sid'ē-us), [key]
1. intended to entrap or beguile: an insidious plan.
2. stealthily treacherous or deceitful: an insidious enemy.
3. operating or proceeding in an inconspicuous or seemingly harmless way but actually with grave effect: an insidious disease.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

inside trackinsight
See also:

Related Content

Play Hangman

Play Poptropica

Play Quizzes

Play Tic Tac Toe