definition of
fluctuation

[1] #1 fluctuation n. a wave motion; "the fluctuations of the sea". wn

[2] #2 fluctuation n. [variation] an instance of change; the rate or magnitude of change. wn

[3] #3 fluctuation n. [wavering] the quality of being unsteady and subject to changes; "he kept a record of price fluctuations". wn