Words / C1

i-LOOZHN/ɪˈluːʒn/

An illusion is a false appearance or idea: an optical illusion, under the illusion that. Delusion (already in the dictionary) is a false belief, often stronger or clinical. Allusion is a hint at another text — a classic mix-up. Do not call a proven finding an illusion because you dislike it.

Meaning

A false idea or appearance; something that seems true but is not.

Examples

• “Cheap flights created an illusion of unlimited travel.”
• “Cheap fares created an illusion of travel without carbon or queues.”
• “An allusion is a reference; an illusion is a false appearance. Delusion is a gripped false belief.”

Good to know

A false appearance/idea. Mix-up: allusion (a reference); delusion (a false belief). Optical illusion is the literal cousin.

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