verb (used without object), un·du·lat·ed, un·du·lat·ing.
- 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), un·du·lat·ed, un·du·lat·ing.
- to cause to move in waves.
- to give a wavy form to.
- Also un·du·lat·ed. having a wavelike or rippled form, surface, edge, etc.; wavy.
- to move or cause to move in waves or as if in waves
- to have or provide with a wavy form or appearance
adjective (ˈʌndjʊlɪt, -ˌleɪt) undulated
- having a wavy or rippled appearance, margin, or forman undulate leaf
v.1660s, from undulation. Related: undulated, undulating.