moment

The definition of a moment is a brief period of time, or a specific point in time.

(noun)

An example of a moment is a thirty-second pause during a walk to look at the sunset.
An example of a moment is the time of the civil rights movement.

See moment in Webster's New World College Dictionary

noun

an indefinitely brief period of time; instant
a definite point in time or in a series of events
a brief time of being important or outstanding
importance; consequence: news of great moment
Mech. the product of some physical quantity and its distance from the origin of coordinates or an axis, as a torque
Philos. any constituent element of a complex entity or process

Origin: ME < L momentum, movement, impulse, brief space of time, importance < *movimentum < movere, to move

See moment in American Heritage Dictionary 4

noun

A brief, indefinite interval of time.
A specific point in time, especially the present time: He is not here at the moment.
A particular period of importance, influence, or significance in a series of events or developments: a great moment in history; waiting for her big moment.
Outstanding significance or value; importance: a discovery of great moment.
A brief period of time that is characterized by a quality, such as excellence, suitability, or distinction: a lackluster performance that nevertheless had its moments.
Philosophy
a. An essential or constituent element, as of a complex idea.
b. A phase or an aspect of a logically developing process.
Abbr. M Physics
a. The product of a quantity and its perpendicular distance from a reference point.
b. The tendency to cause rotation about a point or an axis.
Statistics The expected value of a positive integral power of a random variable. The first moment is the mean of the distribution.