illusion noun
ADJ. dangerous To believe you have nothing more to learn is a dangerous illusion. | optical, visual The road ahead looks wet, but in fact this is an optical illusion.
VERB + ILLUSION be under, entertain, have They are under no illusions about the difficulties ahead of them. | create, give (sb) The huge size of the vehicle gives the illusion of safety. | foster, maintain, preserve, sustain They are trying to maintain the illusion that the company is in good shape. | break, destroy, dispel, shatter Within the first week at university all my illusions were shattered. | shed Now is the time to shed our illusions.
PREP. ~ about/as to She had no illusions about her attractiveness to men.
PHRASES be all an illusion It turned out that their happy marriage was all an illusion.
You can also check other dicts: illusion (English, 中文解释 ), wordnet sense, Collins Definition