- an act of undulating; a wavelike motion.
- a wavy form or outline.
- one of a series of wavelike bends, curves, or elevations.
- a wave.
- the motion of waves.
- the act or an instance of undulating
- any wave or wavelike form, line, etc
n.1640s, from Medieval Latin *undulatio, from Late Latin undulatus “wavy, undulated,” from undula “wavelet,” diminutive of Latin unda “wave” (see water).