denatured (Adjective) — Changed in nature or natural quality. ex. "denatured alcohol"
denatured (Verb) — Add nonfissionable material to (fissionable material) so as to make unsuitable for use in an atomic bomb.
denatured (Verb) — Modify (as a native protein) especially by heat, acid, alkali, or ultraviolet radiation so that all of the original properties are removed or diminished.
denatured (Verb) — Make (alcohol) unfit for drinking without impairing usefulness for other purposes.