def

¹

[ def ]

adverb

, Informal.

1. definitely:

   Going to Europe this summer? But def!

def

²

[ def ]

adjective

1. Slang. excellent:

   That hip-hop record is def!

def.

³

abbreviation for

1. defective.
2. defendant.
3. defense.
4. deferred.
5. defined.
6. definite.
7. definition.

def.

¹

abbreviation for

1. definition

def

²

/ dɛf /

adjective

1. slang.
   very good, esp of hip-hop

Word History and Origins

Origin of def¹

By shortening

Origin of def²

An Americanism dating back to 1980–85; of uncertain origin

Word History and Origins

Origin of def¹

C20: perhaps from definitive

Example Sentences

He is also signed to label Def Jam, which has artists such as Rihanna, Justin Bieber and Pusha T.

From BBC

In 2022, Toto opened for Journey on a U.S. arena tour; this summer, Journey is playing stadiums with Def Leppard.

From Los Angeles Times

Ahead of a show with Journey at SoFi Stadium, the Def Leppard frontman talks about why his band has stuck together.

From Los Angeles Times

Ahead of a show with Journey at SoFi Stadium, the Def Leppard frontman talks about why his band has stuck together.

From Los Angeles Times

Ahead of a show with Journey at SoFi Stadium, the Def Leppard frontman talks about why his band has stuck together.

From Los Angeles Times