un·du·late (ŭnjə-lāt′, ŭndyə-, -də-)
v. un·du·lat·ed, un·du·lat·ing, un·du·lates
1. To move in waves or with a smooth, wavelike motion: "gleaming seaweed that curls and undulates with the tide" (Willa Cather).
2. To have a wavelike appearance or form: dunes that undulate toward the sea.
3. To increase and decrease in volume or pitch.
1. To cause to move in a smooth wavelike motion: The dancer undulated her hips.
2. To give a wavelike appearance or form to: The rock strata are undulated.
adj. (-lĭt, -lāt′)
Having a wavy outline or appearance: leaves with undulate margins.
[From Late Latin undula, small wave, diminutive of Latin unda, wave; see wed-1 in the Appendix of Indo-European roots.]
undu·la·to′ry (-lə-tôr′ē) adj.
(click for a larger image)undulate
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
American Heritage Dictionary Products
The American Heritage Dictionary, 5th Edition
The American Heritage Dictionary of Idioms
The American Heritage Roget's Thesaurus
Curious George's Dictionary
The American Heritage Children's Dictionary
The American Heritage Dictionary of Indo-European Roots
The American Heritage Student Grammar Dictionary
The American Heritage Desk Dictionary + Thesaurus
The American Heritage Science Dictionary
The American Heritage Dictionary of Business Terms
The American Heritage Student Dictionary
The American Heritage Essential Student Thesaurus