a formal element occurring in loanwords from Latin, where it meant “away from”: abdicate; abolition.
Also a-, abs-.

Origin of ab-

< Latin ab (preposition and prefix) from, away, cognate with Greek apó, Sanskrit ápa, German ab, English of1, off
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British Dictionary definitions for ab- (1 of 2)



away from; off; outside of; opposite toabnormal; abaxial; aboral

Word Origin for ab-

from Latin ab away from

British Dictionary definitions for ab- (2 of 2)



denoting a cgs unit of measurement in the electromagnetic systemabvolt

Word Origin for ab-

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