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

The best baby monitors offer high-def video, a wide-screen camera for optimal viewing, night vision, and an alert system if your baby is moving too much.

From Popular-Science

The clip will run for three months on its integrated battery and pairs with a best-in-class high-def baby monitor.

From Popular-Science

Even if the Xbox Series S can’t do true 4K gaming, it does stream movies in native 4K, so you’ll still be able to watch high-def flicks.

From Time

Rico Finally Paid: its easy fast money money and im welling to spoil you to def .

From The Daily Beast

Downstairs, a band called Def Generation, composed mostly of Neville progeny, is killing the hour before the brothers come on.

From The Daily Beast

What do Charlie Sheen, Marion Cotillard, and Mos Def have in common?

From The Daily Beast

From The New Yorker to Mos Def, see the best quotes about the beast on Atlantic Avenue.

From The Daily Beast

He soon garnered a reputation as a stellar stand-up comic, making regular appearances on Def Comedy Jam.

From The Daily Beast

Drowned to def in de hogshead, wid a brick tied erround him.

From Project Gutenberg

One author of eminence pronounces defile in three syllables, def-i-le.

From Project Gutenberg

From kina, hina, originated the Icelandic and Swedish pastpositive def.

From Project Gutenberg

Plane surfaces or planes exist having the property laid down in Def.

From Project Gutenberg

It's jes' waitin' fur de bressin', an' 'pears like 'twould faint ter def ef ye didn't come.

From Project Gutenberg