Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun illusion

4 senses of illusion

Sense 1
illusion, semblance -- (an erroneous mental representation)
       => appearance -- (a mental representation; "I tried to describe his appearance to the police")

Sense 2
illusion, fantasy, phantasy, fancy -- (something many people believe that is false; "they have the illusion that I am very wealthy")
       => misconception -- (an incorrect conception)

Sense 3
delusion, illusion, head game -- (the act of deluding; deception by creating illusory ideas)
       => deception, deceit, dissembling, dissimulation -- (the act of deceiving)

Sense 4
magic trick, conjuring trick, trick, magic, legerdemain, conjuration, thaumaturgy, illusion, deception -- (an illusory feat; considered magical by naive observers)
       => performance -- (the act of presenting a play or a piece of music or other entertainment; "we congratulated him on his performance at the rehearsal"; "an inspired performance of Mozart's C minor concerto")