variation (Noun) — An instance of change; the rate or magnitude of change.
variation (Noun) — An activity that varies from a norm or standard. ex. "any variation in his routine was immediately reported"
variation (Noun) — A repetition of a musical theme in which it is modified or embellished.
variation (Noun) — Something a little different from others of the same type. ex. "an emery wheel is the modern variation of a grindstone"
variation (Noun) — An artifact that deviates from a norm or standard. ex. "he patented a variation on the sandal"
variation (Noun) — The angle (at a particular location) between magnetic north and true north.
variation (Noun) — The process of varying or being varied.
variation (Noun) — (astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon).
variation (Noun) — (biology) an organism that has characteristics resulting from chromosomal alteration.
variation (Noun) — (ballet) a solo dance or dance figure.
variation (Noun) — The act of changing or altering something slightly but noticeably from the norm or standard. ex. "who is responsible for these variations in taxation?"