Meaning of undulate

un•du•late

Pronunciation: (v.un'ju-lāt", un'dyu-, -du-adj.un'ju-lit, -lāt", un'dyu-, -du-), [key]
— v., adj. -lat•ed, -lat•ing,
—v.i.
  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.
—v.t.
  1. to cause to move in waves.
  2. to give a wavy form to.
—adj.
  1. having a wavelike or rippled form, surface, edge, etc.; wavy.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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