- a formal element occurring in loanwords from Latin, where it meant “away from”: abdicate; abolition.
Origin of ab-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- away from; off; outside of; opposite toabnormal; abaxial; aboral
from Latin ab away from
- denoting a cgs unit of measurement in the electromagnetic systemabvolt
abstracted from absolute
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 ab-
word-forming element meaning "away, from, from off, down;" from Latin ab-, ab "off, away from," from PIE root *apo- (see apo-). Reduced to a- before -m-, -p-, or -v-; sometimes abs- before -c- or -t-.
Online Etymology Dictionary, © 2010 Douglas Harper