1. 幻觉的;虚假的;不切实际的
If you describe something as illusory, you mean that although it seems true or possible, it is in fact false or impossible.

1. based on or having the nature of an illusion

e.g. illusive hopes of finding a better job
Secret activities offer presidents the alluring but often illusory promise that they can achieve foreign policy goals without the bothersome debate and open decision that are staples of democracy

Synonym: illusive