deffer

def

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

Origin:
1980–85, Americanism; of uncertain origin

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Collins
World English Dictionary
def (dɛf)
 
adj
slang very good, esp of hip-hop
 
[C20: perhaps from definitive]

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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American Heritage
Abbreviations & Acronyms
def
  1. definite

  2. definitely

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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