Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

"deceptive, illusory," formed in English 1670s, from stem of illusion + -ive; cf. also illusory.

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.