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English definition of “disillusion”

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disillusion

verb [T] uk   /ˌdɪs.ɪˈluː.ʒən/ us  
to disappoint someone by telling them the unpleasant truth about something or someone that they had a good opinion of or respected: I hate to/I'm sorry to disillusion you, but pregnancy is not always wonderful - I was sick every day for six months.
disillusionment
noun [U] uk   /-mənt/ ( also disillusion) us  
There is increasing disillusionment with the government.
(Definition of disillusion from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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