retroactive

Definition of Retroactive in English :

1. retroactive

descriptive of any event or stimulus or process that has an effect on the effects of events or stimuli or process that occurred previously

2. ex post facto, retro, retroactive

affecting things past

Example Sentences:
'retroactive tax increase'
'an ex-post-facto law'
'retro pay'

WordNet Lexical Database for English. Princeton University. 2010.

Retroactive

adjective

1.

applying or referring to the past

retroactive legislation

2.

effective or operative from a date or for a period in the past

adjective

1.

having application to or effect on things done prior to its enactment

a retroactive law

2.

going into effect as of a specified date in the past

a retroactive increase

adj.

Influencing or applying to a period prior to enactment: a retroactive pay increase.