a tendency to produce motion, esp rotation about a point or axis
b.
the product of a physical quantity, such as force or mass, and its distance from a fixed reference point
See also moment of inertia
6. statistics
the mean of a specified power of the deviations of all the values of a variable in its frequency distribution. The power of the deviations indicates the order of the moment and the deviations may be from the origin (giving a moment about the origin) or from the mean (giving a moment about the mean)