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Variation (astronomy), any perturbation of the mean motion or orbit of a planet or satellite, particularly of the moon •
Genetic variation, the difference in DNA among individuals or the differences between populations •
Human genetic variation, genetic differences in and among populations of humans •
Magnetic variation, difference between magnetic north and true north, measured as an angle •
p-variation in mathematical analysis, a family of seminorms of functions •
Coefficient of variation in probability theory and statistics, a standardized measure of dispersion of a probability distribution or frequency distribution •
Total variation in mathematical analysis, a way of quantifying the change in a function over a subset of \mathbb{R}^n or a measure space •
Calculus of variations in mathematical analysis, a method of finding maxima and minima of functionals == Arts ==