Crimethink is the Newspeak word for thoughtcrime (thoughts that are unorthodox, or are outside the official government platform), as well as the verb meaning "to commit thoughtcrime". Goodthink, which is approved by the Party, is the opposite of crimethink.
In the book, Winston Smith, the main character, writes in his diary:
“ | Thoughtcrime does not entail death: thoughtcrime IS death. | ” |
—Orwell, 1984 |
Read more about this topic: List Of Newspeak Words