Definition of "idiosyncrasy" []

• A structural or behavioral characteristic peculiar to an individual or group. (noun)
• A physiological or temperamental peculiarity. (noun)
• An unusual individual reaction to food or a drug. (noun)

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.

• "With those who have lived years down south, one can easily realize that this idiosyncrasy is nothing more than commonplace and an inherent part of living with the natives."
• "Shame on the left wingers for attacking a poor six foot invisible rabbit whose only idiosyncrasy is an alleged fondness for rumpots, crackpots and ‘how are you Mr. Wilson’ comments …"
• "Thinking of the Latin American idiosyncrasy, another significant feature in the cooperation pattern has been the fact that this movement is inclusive, and that it is not perceived as a competitor."