7 results for: retroactive

Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
ret·ro·ac·tive    Audio Help   [re-troh-ak-tiv] Pronunciation Key
–adjective
1.operative with respect to past occurrences, as a statute; retrospective: a retroactive law.
2.pertaining to a pay raise effective as of a past date.

[Origin: 1605–15; retro- + active]

ret·ro·ac·tive·ly, adverb
ret·ro·ac·tiv·i·ty, noun
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
Encyclopædia Britannica, Inc.
retroactive

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© 2008 Encyclopædia Britannica, Inc.
American Heritage Dictionary - Cite This Source - Share This
ret·ro·ac·tive    Audio Help   (rět'rō-āk'tĭv)  Pronunciation Key 
adj.   Influencing or applying to a period prior to enactment: a retroactive pay increase.


[French rétroactif, from Latin retroāctus, past participle of retroagere, to drive back : retrō-, retro- + agere, to drive; see ag- in Indo-European roots.]

ret'ro·ac'tive·ly adv., ret'ro·ac·tiv'i·ty n.
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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
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Online Etymology Dictionary - Cite This Source - Share This
retroactive 
1611, from Fr. rétroactif (fem. rétroactive) "casting or relating back," from L. retroactus, pp. of retroagere "drive or turn back," from retro- "back" + agere "to drive, set in motion" (see act).

Online Etymology Dictionary, © 2001 Douglas Harper
WordNet - Cite This Source - Share This
retroactive

adjective
1. descriptive of any event or stimulus or process that has an effect on the effects of events or stimuli or process that occurred previously [ant: proactive
2. affecting things past; "retroactive tax increase"; "an ex-post-facto law"; "retro pay" [syn: ex post facto

WordNet® 3.0, © 2006 by Princeton University.
Merriam-Webster's Medical Dictionary - Cite This Source - Share This

Main Entry: ret·ro·ac·tive
Pronunciation: "re-trO-'ak-tiv
Function: adjective
: having relation or reference to or efficacy in a prior time; specifically : relating to, caused by, or being obliteration of the results of learning by immediately subsequent activity <retroactive inhibition>

Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
Merriam-Webster's Dictionary of Law - Cite This Source - Share This

Main Entry: ret·ro·ac·tive
Pronunciation: "re-trO-'ak-tiv
Function: adjective
: extending in scope or effect to a prior time or to conditions that existed or originated in the past; especially : made effective as of a date prior to enactment, promulgation, or imposition <a retroactive tax> —see also EX POST FACTO LAWret·ro·ac·tive·ly adverbret·ro·ac·tiv·i·ty /-ak-'ti-v&-tE/ noun

Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.

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