An allusion is an indirect reference. An illusion is a misleading appearance or impression. A line in a poem can allude to a myth. A stage mirror can make a narrow room look wider.
A reference and a false impression
- “Calling the cleanup a Herculean task was an allusion to the labors of Hercules.” The word Herculean draws on a story the reader may recognize.
- “Stripes on the flat floor created the illusion of a step.” The pattern made a step appear where the surface was level.
Look for an allusion to or an illusion of
An allusion to Shakespeare points to his work. The illusion of a second doorway describes how a real space can appear. Use the meaning of the sentence to choose the spelling.
Try it
“The film’s title makes an ___ to a fairy tale. A painted backdrop creates the ___ of a forest.”
Show the answer
Use allusion for the reference and illusion for the false impression.
For the verb related to allusion, see Allude vs. Elude.


