undulate: Meaning and Definition of

un•du•late

1. 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.
2. to have a wavy form or surface; bend with successive curves in alternate directions.
3. (of a sound) to rise and fall in pitch: the wail of a siren undulating in the distance.

1. to cause to move in waves.
2. to give a wavy form to.

1. having a wavelike or rippled form, surface, edge, etc.; wavy.