Definition of "temperamental" []

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Reveka, honest and temperamental, is easily outmaneuvered, and so it is usually Reveka who joylessly plunks a silver tray on the coffee table and retreats in a sulk."
• "And yet there is a certain temperamental similarity, evident enough now, though it would not have been so a dozen years ago."
• "There, he became known as a temperamental experimentalist, obsessive and fearless."