variation

noun

1. an instance of change; the rate or magnitude of change
2. an activity that varies from a norm or standard"any variation in his routine was immediately reported"
3. a repetition of a musical theme in which it is modified or embellished
4. something a little different from others of the same type"an experimental version of the night fighter"
5. an artifact that deviates from a norm or standard"he patented a variation on the sandal"
6. the angle (at a particular location) between magnetic north and true north
7. the process of varying or being varied
8. (astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon)
9. (biology) an organism that has characteristics resulting from chromosomal alteration
10. (ballet) a solo dance or dance figure
11. the act of changing or altering something slightly but noticeably from the norm or standard"who is responsible for these variations in taxation?"