A moment is a particular point in time. Some moments you remember forever: like the moment you earned your driver's license or the moment you learned that you passed your organic chemistry class.

A moment is a short, but unspecified, amount of time. At Thanksgiving, you are supposed to take a moment to be grateful for friends and family. Or maybe you have been asked to observe a "moment of silence" for a national tragedy. Moment can also mean "importance." If you say something is "of little moment," then you are saying it doesn't matter.

Definitions of moment
  1. noun
    an indefinitely short time
    “wait just a moment
    synonyms: bit, minute, mo, second
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    New York minute, blink of an eye, flash, heartbeat, instant, jiffy, split second, trice, twinkling, wink
    a very short time (as the time it takes the eye to blink or the heart to beat)
    type of:
    an indefinite period (usually marked by specific attributes or activities)
  2. noun
    a particular point in time
    “the moment he arrived the party began”
    synonyms: instant, minute, second
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    climax, culmination
    the decisive moment in a novel or play
    eleventh hour, last minute
    the latest possible moment
    moment of truth
    a crucial moment on which much depends
    moment of truth
    the moment in a bullfight when the matador kills the bull
    a very brief moment
    a suitable moment
    psychological moment
    the most appropriate time for achieving a desired effect
    the moment in a literary work when a character makes a startling or critical discovery
    high time
    the latest possible moment
    the time of a particular event
    type of:
    point, point in time
    an instant of time
  3. noun
    at this time
    “she is studying at the moment
    synonyms: here and now, present moment
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    type of:
    nowadays, present
    the period of time that is happening now; any continuous stretch of time including the moment of speech
  4. noun
    importance in effect or influence
    “virtue is of more moment than security”
    synonyms: consequence, import
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    having no important effects or influence
    (used with negation) having consequence
    hell to pay
    dire consequences
    type of:
    the quality of being significant
  5. noun
    a turning force produced by an object acting at a distance (or a measure of that force)
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    moment of inertia
    the tendency of a body to resist angular acceleration
    moment of a couple
    given two equal and opposite forces, the product of the force and the distance between them
    dipole moment
    the moment of a dipole
    electric dipole moment
    the dipole moment in an electric dipole
    magnetic dipole moment
    (physics) a current loop gives rise to a magnetic field characteristic of a magnetic dipole
    type of:
    (physics) the influence that produces a change in a physical quantity
  6. noun
    the n-th moment of a distribution is the expected value of the n-th power of the deviations from a fixed value
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    second moment
    the expected value of the square of the deviations of a random variable from the point of origin
    the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value
    standard deviation
    the square root of the variance
    (statistics) the mean value of the product of the deviations of two variates from their respective means
    type of:
    a datum that can be represented numerically
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