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[uhn-juh-ley-shuh n, uhn-dyuh-, -duh-] /ˌʌn dʒəˈleɪ ʃən, ˌʌn dyə-, -də-/
an act of undulating; a wavelike motion.
a wavy form or outline.
one of a series of wavelike bends, curves, or elevations.
  1. a wave.
  2. the motion of waves.
Origin of undulation
First recorded in 1640-50; undul(ate) + -ation Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for undulation
Historical Examples
  • In undulation, not one wave is like another; in vibration, every pulse is alike.

  • No undulation of air can there convey sound, song, or speech.

    Moon Lore Timothy Harley
  • It is because—this is my hypothesis—these properties, if they are in the undulation, are not there alone.

    The Mind and the Brain

    Alfred Binet
  • The motion of this latter is thought, of which perception is the first undulation.

  • It swayed with a truly Hellenic undulation like the pictures in the mythology.

    The Joys of Being a Woman Winifred Kirkland
  • Often it is their undulation only which reveals the water beneath them.

    Excursions and Poems

    Henry David Thoreau
  • Growth stretches for miles, without ever a hint of undulation.

  • Walls and roof shut it off as they shut off the undulation of light.

  • The Polyphemi of Montfort have an undulation in the centre of the outer lip.

    A Conchological Manual George Brettingham Sowerby
  • By undulation following undulation, sound is diffused in the air.

    Lumen Camille Flammarion
British Dictionary definitions for undulation


the act or an instance of undulating
any wave or wavelike form, line, etc
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 undulation

1640s, from Medieval Latin *undulatio, from Late Latin undulatus "wavy, undulated," from undula "wavelet," diminutive of Latin unda "wave" (see water).

Online Etymology Dictionary, © 2010 Douglas Harper
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