Definition of def in English:

def

Syllabification: def

adjective

informal
Excellent: a truly def tattoo
More example sentences
  • I had to admit that ‘Fight for Your Right ‘was pretty def and all, but c'mon, this wasn't serious music.

Origin

1980s: probably an alteration of death (used in Jamaican English as an intensifier), or shortened from definitive or definite.

Definition of def in: