from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Mental activity; thinking: "The heartless hip analysis of crime is . . . a part of my life and my mentation” ( Scott Turow).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Mental activity. The process of thinking.

from the GNU version of the Collaborative International Dictionary of English

  • n. the process of thinking (especially thinking carefully); mental activity.

from The Century Dictionary and Cyclopedia

  • n. The action or exercise of the mind or of its physical organ; mental activity; ideation; cerebration; intellection.
  • n. The result of mentation; state of mind.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the process of using your mind to consider something carefully


From Latin mēns, ment-, mind; see mental1.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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  • I have heard it in a medical context, referring to the process of thinking, and evaluating a person's medical condition.

    July 13, 2007

  • The first place (and possibly, only place) I saw this word was in the writings of G.I. Gurdjieff. It means "thinking".

    January 20, 2007