(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface
a manner that is serious and solemn
one of a series of ridges that moves across the surface of a liquid (especially across a large body of water)
(physics) a movement up and down or back and forth
move in a wavy pattern or with a rising and falling motion
a hairdo that creates undulations in the hair
