Definition of demented in English:

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Pronunciation: /dɪˈmɛntɪd/


1Suffering from dementia.
Example sentences
  • The diagnosis of an independent depressive disorder becomes difficult in the demented patient.
  • High level of disability is associated with major depression, in both demented and nondemented people.
  • On the flip side, cognition has improved in demented or impaired people given nutritional support.
1.1 informal, chiefly British Behaving irrationally due to anger, distress, or excitement: she was demented with worry
More example sentences
  • To me, it seemed like demented torture, and not very flattering.
  • They fell in the gaily lit hall with a flutter like demented birds attempting flight.
  • I probably looked more than a little demented, come to think of it.
British  sectionable
British informal barmy, crackers, barking, barking mad, round the twist, off one's trolley, as daft as a brush, not the full shilling, one sandwich short of a picnic
Canadian & Australian/New Zealand informal bushed
New Zealand informal porangi



Pronunciation: /dɪˈmɛntɪdli/
Example sentences
  • Some way into the forest Kira stopped abruptly, pressed her nose to the earth and began to dig dementedly.
  • His mother and favourite sister had died of tuberculosis in 1868 and 1877 respectively, and his father - driven close to insanity with grief - became almost dementedly pious.
  • I started to laugh quietly, resentfully, dementedly.


Example sentences
  • I feel the need to comment on the dementedness of the human species every once in a while.
  • Your name will become synonymous with sheer dementedness, as lesser men whisper your name in terror.
  • But, when we do feel a slight bit dazed, it seems as though this dementedness is part of the film's charm.


Mid 17th century: past participle of earlier dement 'drive mad', from Old French dementer or late Latin dementare, from demens 'out of one's mind'.

  • mind from Old English:

    English mind shares its ancient root with Latin mens ‘mind’, from which demented (mid 17th century), mental (Late Middle English), and mention derive. The mind can do many wonderful things, including ‘boggling’. The phrase the mind boggles, meaning that someone becomes astonished or overwhelmed at the thought of something, is first recorded in the 1890s. Boggle itself is probably a dialect word related to bogle ‘a phantom or goblin’ and bogey ‘an evil or mischievous spirit’. Someone may have warned you to mind your Ps and Qs, ‘be careful to behave well and avoid giving offence’. The expression has been known since the 1770s, but its exact origins are uncertain. One obvious suggestion is that it comes from a child's early days of learning to read and write, when they might find it difficult to distinguish between the two tailed letters p and q. Another idea suggests that printers had to be very careful to avoid confusing the two letters when setting metal type. Mind how you go!, meaning ‘be careful, look after yourself’, has been common in Britain since the 1940s. It was popularized by the long-running BBC TV series Dixon of Dock Green (1955–76), in which it was a catchphrase of the avuncular PC George Dixon, along with evening all.

For editors and proofreaders

Line breaks: de|men¦ted

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