allusion and illusion - the difference

An allusion is an indirect reference to something.

An illusion is deception.


The noun allusion denotes a subtle or indirect reference to something (i.e., a hint at something). It derives from the verb to allude.


The Simpsons is full of allusions to well-known films.

His consistent allusions to being so poor as a child are not in keeping with his brother's version of their childhood.


An illusion is a false impression or deception.


It's not an oasis — it is an illusion.

I am under no illusion how much work is required.

See also:

What are nouns?
What are verbs?
List of easily confused words