def

2
[def]

Origin of def

2
An Americanism dating back to 1980–85; of uncertain origin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for deffer

def

adjective
  1. slang very good, esp of hip-hop

Word Origin for def

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

Word Origin and History for deffer

def

adj.

"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

deffer in Medicine

def

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

DEF

abbr.
  1. 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.