'Improperly' definitions:

Definition of 'improperly'

From: WordNet
adverb
In an improper way; "he checked whether the wound had healed improperly" [ant: decent, decently, in good order, properly, right, the right way]

Definition of 'Improperly'

From: GCIDE
  • Improperly \Im*prop"er*ly\, adv. In an improper manner; not properly; unsuitably; unbecomingly. [1913 Webster]