the GNU version of the Collaborative International Dictionary of English
ad. In a manner to deceive.
The Century Dictionary and Cyclopedia
In a manner to deceive.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
ad. in a misleading way
Word Usage
"Suffice it to say that the term "deceptively simple" has rarely been more apt, as a couple we understand to be strangers turn out to be anything but - and the context and meaning of their conversation shifts dramatically in kind."