Def or DEF may refer to:
Music
- Def (instrument), a Middle Eastern musical instrument
- DEF II, a British youth TV programme
- Def American, a rock and rap record label
- Def Jam Recordings, a rap record label
- Def Jux, a rap record label
- Def Leppard, a British hard rock band
- So So Def Recordings, a rap record label
Other uses
- <code>def</code>, a keyword in Python and PostScript
- Danish EL-Federation, Danish trade union for electricians
- Delphi Economic Forum, a Greek nonprofit organization
- Design Exchange Format, or DEF
- , or DEF, Oskar Schindler's Enamel Factory in Kraków, Poland
- Diesel exhaust fluid, or DEF, also known as AdBlue or AUS 32
- Disarmed Enemy Forces, or DEF
- Diethylformamide, an organic solvent
- Drawing Exchange Format
People
- Mos Def, an American rapper, singer and actor
- Def Jef, an American musician and rapper
See also
- Defcon (disambiguation)
- Deaf (disambiguation)
