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English definition of “disillusion”

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disillusion

verb [T]  /ˌdɪs·əˈlu·ʒən/ us  
to disappoint someone by making the person realize the unpleasant truth about something or someone thought to be good: He’s become disillusioned with his job and the company.
disillusioned
adjective  /ˌdɪs·əˈlu·ʒənd/ us  
He died a disillusioned man.
disillusionment
noun [U]  /ˌdɪs·əˈlu·ʒən·mənt/ us  
(Definition of disillusion from the Cambridge Academic Content Dictionary © Cambridge University Press)
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