Meaning of variation
Definition of variation
an activity that varies from a norm or standard; "any variation in his routine was immediately reported"
something a little different from others of the same type; "an experimental version of the night fighter"; "a variant of the same word"; "an emery wheel is the modern variation of a grindstone"; "the boy is a younger edition of his father"
(astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon)
the act of changing or altering something slightly but noticeably from the norm or standard; "who is responsible for these variations in taxation?"