a movement like that of a sudden occurrence or increase in a specified phenomenon | the wave that spreads behind a boat as it moves forward |
a hairdo that creates undulations in the hair | the flow of air that is driven backwards by an aircraft propeller |
the act of signaling by a movement of the hand | the consequences of an event (especially a catastrophic event) |
(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 | |