What is the meaning of variation?

noun

• An instance of change; the rate or magnitude of change.
  • synonyms: fluctuation
• An activity that varies from a norm or standard.
  • usage: "any variation in his routine was immediately reported"
  • synonyms: variance
• A repetition of a musical theme in which it is modified or embellished.
• Something a little different from others of the same type.
  • usage: "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"
  • synonyms: version, variant, edition
• An artifact that deviates from a norm or standard.
  • usage: "he patented a variation on the sandal"
• The angle (at a particular location) between magnetic north and true north.
  • synonyms: magnetic declination, magnetic variation
• The process of varying or being varied.
• Astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon. ()
• Biology) an organism that has characteristics resulting from chromosomal alteration.
  • synonyms: mutant, mutation, sport
• Ballet) a solo dance or dance figure.
  • synonyms: pas seul
• The act of changing or altering something slightly but noticeably from the norm or standard.
  • usage: "who is responsible for these variations in taxation"