Definitions

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

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A behavior or way of thinking that is characteristic of a person.
  • n. A language or behaviour that is particular to an individual or group.
  • n. A peculiar individual reaction to a generally innocuous substance or factor.
  • n. A peculiarity that serves to distinguish or identify.

from the GNU version of the Collaborative International Dictionary of English

  • n. A peculiarity of physical or mental constitution or temperament; a characteristic belonging to, and distinguishing, an individual; characteristic susceptibility; idiocrasy; eccentricity.

from The Century Dictionary and Cyclopedia

  • n. A peculiarity of mental or physical constitution or temperament; characteristic susceptibility or antipathy inherent in an individual; special mental disposition or tendency.

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

  • n. a behavioral attribute that is distinctive and peculiar to an individual

Etymologies

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

Greek idiosunkrāsiā : idio-, idio- + sunkrāsis, mixture, temperament (sun-, syn- + krāsis, a mixing).

from Wiktionary, Creative Commons Attribution/Share-Alike License

First attested in 1604, in modern sense since 1665, from Old French idiosyncrasie, from Ancient Greek ἰδιοσυγκρασία (idiosunkrasia, "one’s own temperament"), from ἴδιος (idios, "one’s own") + σύν (sun, "together") + κρᾶσις (krasis, "temperament").

Examples

Comments

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  • noun: a behavioral attribute that is distinctive and peculiar to an individual

    Peggy's numerous idiosyncrasies include wearing mismatched shoes, laughing loudly to herself, and owning a pet aardvark.

    October 19, 2016