Vĭ'cious1, a.
(vĭsh'us), a. [Fr. vicieux, O. Fr. vitios, vitious, Pr. vicios, Sp. & Pg. vicioso, It. vizioso, Lat. vitiosus, from vitium, vice.]
Sense 1. Characterized by vice or defects; defective; imperfect.
The title of these lords was vicious in its origin. Burke.
Upon their own blunder they built a charge against Bentley of vicious reasoning. De Quincey.
Sense 2. Addicted to vice; corrupt in principles or conduct; depraved; wicked; corrupt; as, a vicious race of men; vicious children; vicious examples; vicious conduct.
Sense 3. Lacking purity; foul; bad; as, vicious air, water, weather, and the like.
Sense 4. Not genuine or pure; as, vicious language; vicious idioms.
Sense 5. Not well tamed or broken; given to bad tricks; unruly; refractory; as, a vicious horse.
Synonyms—Corrupt; faulty; wicked.