vb, de*na*tured  de*na*tur*ing  vt :  to deprive of natural qualities: as  a  :  to make (alcohol) unfit for drinking (as by adding an obnoxious substance) without impairing usefulness for other purposes  b  :  to modify the molecular structure of (as a protein or DNA) esp. by heat, acid, alkali, or ultraviolet radiation so as to destroy or diminish some of the original properties and esp. the specific biological activity vi  :  to become denatured .
 
 
 
Similar sounding terms:  dan·der  den·ture  ten·der 
 
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