a movement like that of a sudden occurrence or increase in a specified phenomenon | a wave (as a sound wave in a chamber or an electromagnetic wave in a transmission line) in which the ratio of its instantaneous amplitude at one point to that at any other point does not vary with time |
a hairdo that creates undulations in the hair | |
the act of signaling by a movement of the hand | |
(physics) a movement up and down or back and forth | |
one of a series of ridges that moves across the surface of a liquid (especially across a large body of water) | |
something that rises rapidly | |
a persistent and widespread unusual weather condition (especially of unusual temperatures) | |
an undulating curve | |