About Can we simply say that the standard deviation is the mean of the deviations from the mean?

Bessel's Correction: Why Sample Variance Divides by n Minus 1 Mathematics in general Population vs. Sample Standard Deviation: Dividing by n vs. n Minus 1 Mathematics for nonmathematicians (engineering, social sciences, etc.) Standard Deviation Formulas for Population and Samples Standard Deviation as a Measure of Dispersion