Definition of "deface"

deface

/dɪˈfeɪs/

verb
third-person singular simple present defaces, present participle defacing, simple past and past participle defaced
1. To damage or vandalize something, especially a surface, in a visible or conspicuous manner.
  Quotations
  That wondrous frame where melody began / Lay as a tomb defaced that no eye cared to scan.
  1869: George Eliot, The Legend of Jubal
2. To void or devalue; to nullify or degrade the face value of.
  Quotations
  One-and-twenty worn and defaced shillings, however, were considered as equivalent to a guinea, which perhaps, indeed, was worn and defaced too, but seldom so much so.
  1776: Adam Smith, The Wealth of Nations
3. (heraldry, flags) To alter a coat of arms or a flag by adding an element to it.