The Collaborative International Dictionary of English v.0.48:
Delusory \De*lu"so*ry\a. Delusive; fallacious. --Glanvill. [1913 Webster]WordNet (r) 3.0 (2006):
delusory adj 1: causing one to believe what is not true or fail to believe what is true; "deceptive calm"; "a delusory pleasure" [syn: deceptive, delusory]