Definition of undulation:
- A motion to and fro, up and down, or from side to side, in any fluid or elastic medium, propagated continuously among its particles, but with no translation of the particles themselves in the direction of the propagation of the wave; a wave motion; a vibration.
- A wavy appearance or outline; waviness.
- The act of undulating; a waving motion or vibration; as, the undulations of a fluid, of water, or of air; the undulations of sound.
- The pulsation caused by the vibrating together of two tones not quite in unison; - called also beat.
- The tremulous tone produced by a peculiar pressure of the finger on a string, as of a violin.
- "The Garden Of Allah", Robert Hichens.
- "The Sign of the Spider", Bertram Mitford.
The mere making of the general hypothesis or guess is simple enough, both modes of transmitting influence, the projection of moving matter and the travelling of an undulation or wave movement, being familiar facts.- "Logic, Inductive and Deductive", William Minto.