[ uhn-juh-ley-shuhn, uhn-dyuh-, -duh- ]
See synonyms for undulation on Thesaurus.com
  1. an act of undulating; a wavelike motion.

  2. a wavy form or outline.

  1. one of a series of wavelike bends, curves, or elevations.

  2. Physics.

    • a wave.

    • the motion of waves.

Origin of undulation

First recorded in 1640–50; undul(ate) + -ation

Words Nearby undulation

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use undulation in a sentence

  • In this case the undulation strikes but a moderate blow; the wave is not greatly broken.

    Outlines of the Earth's History | Nathaniel Southgate Shaler
  • From the camp of the previous evening it had evidently been hidden from view by an undulation in the surface.

    The Home of the Blizzard | Douglas Mawson
  • Herein lies the idea of the barcarolle, the ebb and flow, the undulation of each measure.

    Piano Mastery | Harriette Brower
  • Thirty-six hours were occupied in the journey of the great undulation from Krakatoa to its antipodes.

    Time and Tide | Robert S. (Robert Stawell) Ball
  • There was no appearance of undulation; when the lumps sank, other lumps did not rise in the intervals between them.

    Mythical Monsters | Charles Gould

British Dictionary definitions for undulation


/ (ˌʌndjʊˈleɪʃən) /

  1. the act or an instance of undulating

  2. 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