Abbreviation of deficit. / Abbreviation of definition.

Abbreviation of definitely.

(law) Abbreviation of defense.

(automotive) Abbreviation of diesel exhaust fluid. / (role-playing games) Initialism of defence point.

(African-American Vernacular, slang) excellent; very good

Abbreviation of high-definition.

plural of def'n

Abbreviation of definition.

Able to be defaced.

To damage or vandalize something, especially a surface, in a visible or conspicuous manner. / To void or devalue; to nullify or degrade the face value of.