"having incorrect or imperfect acquaintance with the facts," mid-15c., past-participle adjective from misinform.
Entries linking to misinformed
misinform v.
"inform erroneously, make a false statement to; give misleading instruction to," late 14c., misinfourmen, from mis- (1) "badly, wrongly" + inform (v.). Related: Misinformed; misinforming.