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[in-kon-stuh nt] /ɪnˈkɒn stənt/
not constant; changeable; fickle; variable:
an inconstant friend.
Origin of inconstant
late Middle English
1375-1425; late Middle English inconstaunt < Latin inconstant- (stem of inconstāns) changeable. See in-3, constant
Related forms
inconstancy, noun
inconstantly, adverb
moody, capricious, vacillating, wavering; undependable, unstable, unsettled, uncertain; mutable, mercurial, volatile. See fickle.
steady. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for inconstant
Contemporary Examples
Historical Examples
  • I hope, Fanny, you are not inconstant; I assure you he deserves much better of you.

    Joseph Andrews Vol. 1 Henry Fielding
  • Some are warm, but volatile and inconstant; he was warm too, but steady and unchangeable.

  • They bloom together, they wither together; not one of them is inconstant.

    A Hungarian Nabob Maurus Jkai
  • Does he seem so light and inconstant that he needs some discipline?

    Journeys Through Bookland, Vol. 8 Charles H. Sylvester
  • Violet would no more allow me to be supplanted than Percy could be inconstant.'

    Heartsease Charlotte M. Yonge
  • But his mind was of a peculiar cast, and his temper most inconstant.

  • You represented a divinity, beautiful, disdainful, inconstant.

    Ten Years Later Alexandre Dumas, Pere
  • First, I say, the history of miracle is of inconstant power.

  • I would not believe the Fair Geraldine inconstant, though all hell told me so.

    Windsor Castle William Harrison Ainsworth
British Dictionary definitions for inconstant


not constant; variable
Derived Forms
inconstancy, noun
inconstantly, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for inconstant

c.1400, "fickle, not steadfast," from Middle French inconstant (late 14c.), from Latin inconstantem (nominative inconstans) "changeable, fickle, capricious," from in- "not, opposite of, without" (see in- (1)) + constantem (see constant). Related: Inconstantly.

Online Etymology Dictionary, © 2010 Douglas Harper
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inconstant in Medicine

inconstant in·con·stant (ĭn-kŏn'stənt)

  1. Changing or varying, especially often and without discernible pattern or reason.

  2. Relating to a structure that normally may or may not be present.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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