Definition of thoughtcrime noun from the Oxford Advanced American Dictionary

 

thoughtcrime

 noun
noun
NAmE//ˈθɔtkraɪm//
 
[uncountable, countable]
 
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an idea or opinion that is considered socially unacceptable or criminal From George Orwell's novel Nineteen Eighty-Four.
See the Oxford Advanced Learner's Dictionary entry: thoughtcrime