1
a
: a minute portion or point of time : instant
a moment of dreadful suspense—Graham Greene
b
: a comparatively brief period of time
moments of solitude
2
a
: present time
at the moment she is at work on her fourth novel—Holiday
b
: a time of excellence or conspicuousness
there's … some deliciously funny moments, but most of it is numbingly subtle—Jess Cagle
3
: importance in influence or effect
decisions of moment must be made by our government—L. H. Evans
4
obsolete
: a cause or motive of action
5
: a stage in historical or logical development
a document of one moment in the history of thought and sensibility in the nineteenth century—T. S. Eliot
6
a
: tendency or measure of tendency to produce motion especially about a point or axis
b
: the product of quantity (such as a force) and the distance to a particular axis or point
7
a
: the mean (see mean entry 4 sense 1b) of the nth powers of the deviations (see deviation sense b) of the observed values in a set of statistical data from a fixed value
b
: the expected value of a power of the deviation (see deviation sense b) of a random variable from a fixed value
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Merriam-Webster unabridged
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