A Variation

1. The act of varying; a partial change in the form, position, state, or qualities of a thing.
2. A related but distinct thing.
3. (nautical) The angular difference at the vessel between the direction of true north and magnetic north.Synonym: magnetic declination
4. (board games) A line of play that differs from the original.
5. (music) A technique where material is repeated with alterations to the melody, harmony, rhythm, timbre, texture, counterpoint or orchestration; but with some invariant characteristic, e.g. a ground bass.
6. (genetics) The modification of a hereditary trait.
7. (astronomy) Deviation from the mean orbit of a heavenly body

https://en.wikipedia.org/wiki/Variation