What does "illusive" mean?

Subject to or pertaining to an illusion, often used in the sense of an unrealistic expectation or an unreachable goal or outcome.

What is a synonym for "illusive"?

Common synonyms include: illusory, airy, all in the mind, apparent, apparently sound, apparitional.

/ɪˈluːsɪv/ adj

adj ·Moderate ·College level

Adjective

1
Subject to or pertaining to an illusion, often used in the sense of an unrealistic expectation or an unreachable goal or outcome.
"Testing software completely is an illusive goal."

Adjective

"Testing software completely is an illusive goal."

Borrowed from Medieval Latin illūsīvus.