n. The act of oscillating; a kind of vibration in which a body of sensible size swings backward and forward, not by virtue of its own elasticity merely; a swinging like that of a pendulum.n. Variation or fluctuation, in general; wavering.n. Same as vibration in the technical acoustical sense.n. In music, same as beat, 7 , or beating, 5.n. Synonyms Swaying, etc. See vibration.n. In mathematics, the difference, for values of x in the interval (x-h, x + h;), between the lowest value that a real function fx of a real variable x cannot exceed and the highest value below which fx cannot fall.