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[def] /dɛf/
Slang. excellent:
That hip-hop record is def!
Origin of def2
An Americanism dating back to 1980-85; of uncertain origin Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for deffer


(slang) very good, esp of hip-hop
Word Origin
C20: perhaps from definitive
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for deffer



"excellent," first recorded 1979 in Black English, perhaps a shortened form of definite, or from a Jamaican variant of death.

Online Etymology Dictionary, © 2010 Douglas Harper
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deffer in Medicine

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 definitions & phrases for deffer



Excellent; wonderful; cool, rad: She is really def/ He's got a def girlfriend

[1983+ Black; origin uncertain; perhaps fr black English (Jamaican) pronunciation of death, where the semantics would resemble those of killer, murder, etc; certainly interpreted by many as a shortening of definite]

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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