the GNU version of the Collaborative International Dictionary of English
ad. In a disloyal manner.
The Century Dictionary and Cyclopedia
In a disloyal manner; with violation of loyalty; faithlessly; perfidiously.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
ad. without loyalty; in a disloyal manner
Word Usage
"It usually infuriates me when people say that writers are just "looking for copy", because it is very rarely the case, but the idea skipped disloyally through my mind for one uncomfortable moment."