WordReference Random House Unabridged Dictionary of American English © 2026
op′tical illu′sion. 
  1. PsychologySee under illusion (def. 4).
  • 1785–95

'optical illusion' also found in these entries (note: many are not synonyms or translations):
canal - entasis - film - illusion - motion picture - phantasmagoria - phantom - trick - victim
In Lists: Magic, more...

Forum discussions with the word(s) "optical illusion" in the title:


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