a turning. bending. or twisting force exerted by a lever. defined as the force (acting perpendicular to the lever) multiplied by the length of the lever.
Merriam-Webster Online Dictionary
moment (noun)1.
a) a minute portion or point of time - instant
b) a comparatively brief period of time
2.
a) present time
b) a time of excellence or conspicuousness
3.
importance in influence or effect
4.
obsolete a cause or motive of action
5.
a stage in historical or logical development
6.
a) tendency or measure of tendency to produce motion especially about a point or axis
b) the product of quantity (as a force) and the distance to a particular axis or point
7.
a) the mean of the th powers of the deviations of the observed values in a set of statistical data from a fixed value - n
b) the expected value of a power of the deviation of a random variable from a fixed value importance
moment (Wikipedia)