See more synonyms for demented on

Origin of demented

First recorded in 1635–45; dement + -ed2
Related formsde·ment·ed·ly, adverbde·ment·ed·ness, nounhalf-de·ment·ed, adjectivesem·i·de·ment·ed, adjective

Synonyms for demented

See more synonyms for on Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for dementedly

Contemporary Examples of dementedly

British Dictionary definitions for dementedly


  1. mad; insane
Derived Formsdementedly, adverbdementedness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for dementedly



1640s, from obsolete dement "drive mad."

Online Etymology Dictionary, © 2010 Douglas Harper

dementedly in Medicine


  1. Mentally ill; insane.
  2. Suffering from dementia.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.