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

1. defective.

2. defendant.

3. defense.

4. deferred.

5. defined.

6. definite.

7. definition.

def.

¹

abbreviation

1. definition

def

²

/ dɛf /

adjective

1. slang,  very good, esp of hip-hop

Word History and Origins

Origin of def.¹

By shortening

Origin of def.²

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

Word History and Origins

Origin of def.¹

C20: perhaps from definitive

Example Sentences

Def Leppard's Vivian Campbell has revealed while performing in certain parts of Northern Ireland during the Troubles he would "shut up" on stage.

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Campbell joined Def Leppard in the early 1990s.

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Though streaming services like Spotify and Apple Music didn’t immediately publish the album’s credits, a press release from Bieber’s label Def Jam said he made “Swag II” with much of the same team behind “Swag,” including Carter Lang, Dylan Wiggins, Dijon, Mk.gee,

Read more on Los Angeles Times

The Killers and Def Leppard said they had never been asked to perform.

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Bathory also dressed the part, drawing attention for his Def Leppard T-shirt with the Union Jack flag, studded leather jackets and belts, and long hair.

Read more on Los Angeles Times