Meaning of the word derangement in English

What does derangement mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

derangement

US /dɪˈreɪndʒd.mənt/
UK /dɪˈreɪndʒd.mənt/

Noun

1.

the state of being completely unable to think clearly or behave in a controlled way, especially because of mental illness:

Example:
She had a history of mental derangement
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