illusion
/ɪˈl(j)uːʒ(ə)n/
Anything that seems to be something that it is not.
Using artificial additives, scientists can create the illusion of fruit flavours in food.
A misapprehension; a belief in something that is in fact not true.
Jane has this illusion that John is in love with her.
A magician’s trick.
The state of being deceived or misled.