doublethinkPronunciation: /ˈdʌb(ə)lθɪŋk/Definition of doublethink noun [mass noun] the acceptance of contrary opinions or beliefs at the same time, especially as a result of political indoctrination. Origin: 1949: coined by George Orwell in his novel Nineteen Eighty-Fourdoublethink in other Oxford dictionaries Definition of doublethink in the US English dictionary