def

1 [def]
adverb Informal.
definitely: Going to Europe this summer? But def!
Relevant Questions

Origin:
by shortening

Dictionary.com Unabridged

def

2 [def]
adjective
Slang. excellent: That hip-hop record is def!

Origin:
1980–85, Americanism; of uncertain origin

00:10
Def is always a great word to know.
So is flibbertigibbet. Does it mean:
a scrap or morsel of food left at a meal.
a chattering or flighty, light-headed person.

def.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
def (dɛf) [Click for IPA pronunciation guide]
 
adj
slang very good, esp of hip-hop
 
[C20: perhaps from definitive]

def.
 
abbreviation for
definition

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

def
"excellent," first recorded 1979 in Black English, perhaps a shortened form of definite (see define), or from a Jamaican variant of death.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

def abbr.
decayed, extraction indicated due to caries, or filled (used for deciduous teeth)

DEF abbr.
decayed, extraction indicated due to caries, or filled (used for permanent teeth)

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang Dictionary

def definition

[dɛf]
  1. mod.
    better; cool. (Originally black. From definitive.) : Man, that yogurt is def!
  2. mod.
    definitely. : This is def the best there is.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
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American Heritage
Abbreviations & Acronyms
def
  1. definite

  2. definitely

def.
  1. defective

  2. defendant

  3. defense

  4. deferred

  5. definite

  6. definition

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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