1 a : a rising and falling in waves b : a wavelike motion to and fro in a fluid or elastic medium propagated continuously among its particles but with little or no ...
A regular rising and falling or movement to alternating sides; movement in waves. 2. A wavelike form, outline, or appearance. 3. One of a series of waves or ...
v. un·du·lat·ed, un·du·lat·ing, un·du·lates. v.intr. 1. To move in waves or with a smooth, wavelike motion: "gleaming seaweed that curls and undulates with the ...