- (countable) Anything that seems to be something that it is not.
- We saw what looked like a tiger among the trees, but it was an illusion caused by the shadows of the branches.
- Using artificial additives, scientists can create the illusion of fruit flavours in food.
- (countable) A misapprehension; a belief in something that is in fact not true.
- Jane has this illusion that John is in love with her.
- (countable) A magician’s trick.
- (uncountable) The fact of being an illusion (in any of the above senses).
anything that seems to be something that it is not
belief in something that is in fact not true
fact of being an illusion
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illusion f. (plural illusions)