Variation means an instance of change or the rate or magnitude of change. It may refer to:

Biology:

• Biodiversity
• Genetic diversity, differences within a species

Physics:

• Magnetic variation, difference between magnetic north and true north, measured as an angle
• Variation (astronomy), any perturbation of the mean motion or orbit of a planet or satellite, particularly of the Moon

Mathematics:

• Bounded variation
• Calculus of variations, a field of mathematics which deals with functions of functions.
• Permutation

Statistics:

• Coefficient of variation in statistics, the magnitude of variance relative to the mean.
• Statistical dispersion, a notion of the extent of spread in measurements of a variable, quantified in the variance.

Arts:

• Variation (ballet), solo dance or dance figure
• Variation (music), formal technique where material is altered during repetition
• Variations (album), composed by Andrew Lloyd Webber
• Variation on a theme, in art history

Other:

• Variation (linguistics)
• Variation (game), modifications made to a game by a community of players (as opposed to a central authority)
• Variation (game tree), particular series of moves

ca:Variació cs:Variace de:Variation es:Variación gl:Variación lt:Variacija no:Variasjon pl:Wariacja pt:Variação ru:???????? sk:Variácia fi:Variaatio uk:????????