from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Influencing or applying to a period prior to enactment: a retroactive pay increase.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Extending in scope, effect, application or influence to a prior time or to prior conditions
from the GNU version of the Collaborative International Dictionary of English
- adj. Fitted or designed to retroact; operating by returned action; affecting what is past; retrospective.
from The Century Dictionary and Cyclopedia
- Retroacting; having a reversed or retrospective action; operative with respect to past circumstances; holding good for preceding cases.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. descriptive of any event or stimulus or process that has an effect on the effects of events or stimuli or process that occurred previously
- adj. affecting things past
French rétroactif, from Latin retroāctus, past participle of retroagere, to drive back : retrō-, retro- + agere, to drive; see ag- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)