- An act of defacing; an instance of visibly marring or disfiguring something.
- Some consider the defacement of the Sphinx to be the most egregious crime of Napolean's campaigns.
- An act of voiding or devaluing; nullification of the face value.
- The soldiers found a variety of creative uses for their payment scrip after its defacement to scrap paper; some used it as toilet paper.
- (heraldry, vexillology) A symbol added to a flag or coat of arms to change it or make it different from another.
- Defacement generally has negative valence (that is, it is a bad thing), except in heraldry, where it is a neutral term.
- (act of defacing): disfiguration, graffiti, obliteration, vandalism
- (nullification of face value): cancellation, devaluation