undulation

noun un·du·la·tion \ ˌən-jə-ˈlā-shən , ˌən-dyə- , ˌən-də- \
|Updated on: 23 Jul 2018

Definition of undulation

1 a : a rising and falling in waves
b : a wavelike motion to and fro in a fluid or elastic medium propagated continuously among its particles but with little or no permanent translation of the particles in the direction of the propagation : vibration
2 : the pulsation caused by the vibrating together of two tones not quite in unison
3 : a wavy appearance, outline, or form : waviness

Recent Examples of undulation from the Web

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First Known Use of undulation

1646

in the meaning defined at sense 1a

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