Definify.com
Webster 1913 Edition
Unlearn
Un-learn′
,Verb.
T.
[1st pref.
un-
+ learn
.] 1.
To forget, as what has been learned; to lose from memory; also, to learn the contrary of.
I had learned nothing right; I had to
unlearn
everything. Milner.
2.
To fail to learn.
[Obs.]
Dr. H. More.
Webster 1828 Edition
Unlearn
UNLEARN'
,Verb.
T.
I had learned nothing right; I had to unlearn everything.