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

  • adj. Relating to or caused by temperament: our temperamental differences.
  • adj. Excessively sensitive or irritable; moody.
  • adj. Likely to perform unpredictably; undependable: a temperamental motor.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. of, related to, or caused by temperament
  • adj. subject to changing and unpredictable emotional states; moody, capricious; sometimes used figuratively to describe user-unfriendly or unstable machines or software that are either complicated and/or have poorly written instructions and are subsequently difficult to operate.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to temperament; constitutional.

from The Century Dictionary and Cyclopedia

  • Of or pertaining to temperament.

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

  • adj. relating to or caused by temperament
  • adj. likely to perform unpredictably
  • adj. subject to sharply varying moods


Sorry, no etymologies found.



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  • But it is undeniably correct :)

    December 17, 2007

  • That WeirdNet definition is so helpful.

    Maybe I'm just being temperamental....

    December 17, 2007