Found 2 items, similar to retroactively.
English → English (WordNet)
Definition: retroactively
retroactively
adv : after the fact;
“he will get paid retroactively”
English → English (gcide)
Definition: Retroactively
Retroactively
\Re`tro*act"ive*ly\, adv.
In a retroactive manner.
[1913 Webster]