∙ the act of oscillating or the state of being oscillated
∙ a regular periodic fluctuation in value about some mean
∙ a single such cycle
∙ defined for each point x{\displaystyle x} in the domain of the function by inf{diam(f(U))∣U is a neighborhood of x}{\displaystyle \inf \left\{\mathrm {diam} (f(U))\mid U\mathrm {\ is\ a\ neighborhood\ of\ } x\right\}}, and describes the difference (possibly ∞) between the limit superior and limit inferior of the function near that point. of a function