1. an erroneous mental representation

Similar word(s): semblance

Definition categories: thought, appearance

2. something many people believe that is false

- they have the illusion that I am very wealthy

Similar word(s): fancy, fantasy, phantasy

Definition categories: thought, misconception

3. the act of deluding; deception by creating illusory ideas

Similar word(s): delusion

Definition categories: act, deceit, deception, dissembling, dissimulation

4. an illusory feat; considered magical by naive observers

Similar word(s): conjuration, deception, legerdemain, magic, thaumaturgy, trick

Definition categories: act, performance

Sentences with illusion as a noun:

- 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.

- Jane has this illusion that John is in love with her.