To swing back-and-forth with a reliable, continuous rhythm.
To waver, as between conflicting opinions or courses of activity; vacillate: "The court features oscillated throughout the years from more liberal to less, much more conventional to less, depending upon who had been president during the time of vacancies” ( Gordon J. Humphrey). See Synonyms at move.
Physics to alter between alternative extremes, generally within a definable duration.
To move backward and forward; to vibrate like a pendulum; to move; to sway.
to alter or fluctuate between fixed restrictions; to do something or relocate a fickle or fluctuating fashion; to change over and over repeatedly, to and fro.