WordWeb Online

1. Changed in nature or natural quality
   "denatured alcohol";
   - denaturized, denaturised [Brit]

1. Add nonfissionable material to (fissionable material) so as to make unsuitable for use in an atomic bomb
    
2. Modify (as a native protein) especially by heat, acid, alkali, or ultraviolet radiation so that all of the original properties are removed or diminished
    
3. Make (alcohol) unfit for drinking without impairing usefulness for other purposes

See also: changed

Type of: alter, change, modify

Encyclopedia: Denatured