- Disillusion is defined as disappointment that you feel when you realize something you thought was true wasn't, or when you realize that something you thought was good is not as good as you believed it was.
An example of disillusion is what you feel when you find out that Santa isn't real.
- To disillusion means to cause someone to realize that a belief or ideal they had was false.
An example of disillusion is when you tell a small child that Santa isn't real.
- to free from illusion or false ideas; disenchant
- to take away the ideals or idealism of and make disappointed, bitter, etc.
transitive verbdis·il·lu·sioned, dis·il·lu·sion·ing, dis·il·lu·sions
- The act of disenchanting.
- The condition or fact of being disenchanted.
(third-person singular simple present disillusions, present participle disillusioning, simple past and past participle disillusioned)
(usually uncountable, plural disillusions)
- (countable) The act or process of disenchanting or freeing from a false belief.
- (uncountable) The state of having been or process of becoming freed of false belief.
dis- + illusion