The Collaborative International Dictionary
Delusive \De*lu"sive\, a. [See Delude.] Apt or fitted to delude; tending to mislead the mind; deceptive; beguiling; delusory; as, delusive arts; a delusive dream.
Delusive and unsubstantial ideas.
--Whewell.
-- De*lu"sive*ly, adv. -- De*lu"sive*ness, n.
Wiktionary
adv. In a delusive or deluded manner.
WordNet
adv. in a deceptive and unrealistic manner; "the village looked delusively near"
Usage examples of "delusively".
When a lady, in a delicate and costly summer garb, with a floating veil and gracefully swaying gown, and, altogether, an ethereal lightness that made you look at her beautifully slippered feet, to see whether she trod on the dust or floated in the air—when such a vision happened to pass through this retired street, leaving it tenderly and delusively fragrant with her passage, as if a bouquet of tea-roses had been borne along—then again, it is to be feared, old Hepzibah's scowl could no longer vindicate itself entirely on the plea of near-sightedness.
Of his simplicity let me record an instance where a sad and civil young Chinaman brought me certain shirts with most of the but tons missing and others hanging on delusively by a single thread.