The Collaborative International Dictionary
Undulate \Un"du*late\, v. t. [imp. & p. p. Undulated; p. pr. & vb. n. Undulating.] To cause to move backward and forward, or up and down, in undulations or waves; to cause to vibrate.
Breath vocalized, that is, vibrated and undulated.
--Holder.
Undulating \Un"du*la`ting\, a. Rising and falling like waves; resembling wave form or motion; undulatory; rolling; wavy; as, an undulating medium; undulating ground. -- Un"du*la`ting*ly. adv.
Wiktionary
1 Moving up and down like waves; wavy 2 Forming a series of regular curves v
(present participle of undulate English)
Usage examples of "undulating".
With an odd, undulating movement, the creature began to move toward the northeast, its arms and body lengthening and shortening as it went, like the ebb and flow of the tide.
Cosmic radiation, the planet’s undulating magnetic flux, the doughty gusts of solar wind.
The verdant, undulating quilt of jungle rolled past below the voidhawk’s sensor blisters, and it concentrated every spare neural cell on analysing the images.
All that remained was a solid undulating tangle of roots, extending outwards for a hundred metres, slimed like seaside rocks at low tide.
The whole area was ruptured by steep-walled two-metre craters, undulating like a sea swell.
They bobbed and spun and sailed calmly along with the current, undulating with the swell.
The tough metal was visibly undulating as the structure’s seesaw fluctuations increased.
There were no fields, or meadows, or scrubland, just a slick piss-brown coating, undulating and gurgling as it crept inexorably along.
Stephanie was tempted just to keep to the undulating foothills that ran along the valley wall.
Dry mud creaked and crumbled under their feet as they tramped along the gently undulating road.
Its behaviour was perfectly natural, fronds undulating and twisting about on the currents of air.
Its leading edge was less than a mile away from the tenement, undulating gently.
They walked with a curious undulating motion, rolling along on their six or ten or twelve legs, their amber eyes glazed with the spells that kept them docile.
It did not marvel at the beauty of the coral palaces or undulating sea forests as lush and colorful as a jungle.
A large eel with iridescent scales floated past her with an undulating, swimming motion.