verb (used without object), undulated, undulating.
to move with a sinuous or wavelike motion; display a smooth rising-and-falling or side-to-side alternation of movement
: The flag undulates in the breeze.
to have a wavy form or surface; bend with successive curves in alternate directions.
(of a sound) to rise and fall in pitch: the wail of a siren undulating in the distance.
verb (used with object), undulated, undulating.
to cause to move in waves.
to give a wavy form to.
Also, undulated. having a wavelike or rippled form, surface, edge, etc.; wavy.
Origin: 1650–60; Related forms
< Latin undulātus
waved, equivalent to und
) wave + -ul
+ -ātus -ate1