
[Middle English, from Old French, from Latin mōmentum, from *movimentum. See momentum.]
SYNONYMS moment, instant, minute, second, jiffy, flash. These nouns denote a brief interval of time. A moment is an indeterminately short but significant period: I'll be with you in a moment. Instant is a period of time almost too brief to detect; it implies haste: He hesitated for just an instant. Minute is often interchangable with moment and second with instant: The alarm will ring any minute. I'll be back in a second. Jiffy and flash usually combine with in a; in a jiffy means in a short space of time, while in a flash suggests the almost imperceptible duration of a flash of light: "He was on his stool in a jiffy, driving away with his pen" (Charles Dickens). She finished the job in a flash. See also synonyms at importance.
| mogul, modus vivendi, modus operandi | |
| momentarily, momently, momento |
For a random variable X the rth moment (about the origin) is defined to be the expectation of Xr, where r is a non-negative integer. It is usually denoted by μ′r. So μ′0=1 and μ′1=μ, the mean of the distribution of X.
The rth moment about the mean (or central moment or corrected moment) is defined to be the expectation of (X−μ)r and is usually denoted by μr. Thus μ1=0 and μ2=σ2, the variance of X. The moments about the mean can be expressed as linear combinations of the uncorrected moments, for example:

noun
Idioms beginning with moment:
moment of truth
In addition to the idiom beginning with moment, also see at this point (moment); every minute (moment) counts; for the moment; have one's moments; just a minute (moment); live for the moment; never a dull moment; not for a moment; of the moment; on the spur of the moment; weak moment.
The property by which a force tends to cause a body, to which it is applied, to rotate about a point or line; equal in magnitude to the product of the force and the perpendicular distance of the point from the line of action of the force.
(DOD, NATO) In air transport, the weight of a load multiplied by its distance from a reference point in the aircraft.
The right man is the one who seizes the moment.
— Johann Wolfgang von Goethe, (1749-1832), German philosopher, scientist and writer.
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1. the force exerted by a lever about a fulcrum.
2. statistically, the mean. The first moment is the same as the mean, the second moment is the mean of the square of a variable, and so on.

In physics, the term moment can refer to many different concepts.
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Moment of force (often just moment) is the tendency of a force to twist or rotate an object; see the article torque for details. A moment is valued mathematically as the product of the force and the moment arm. The moment arm is the perpendicular distance from the point of rotation, to the line of action of the force. The moment may be thought of as a measure of the tendency of the force to cause rotation about an imaginary axis through a point.[1] (Note: In mechanical and civil engineering, "moment" and "torque" have different meanings, while in physics they are synonyms. See the discussion in the "torque" article, or the article couple (mechanics).)
The moment of a force can be calculated about any point and not just the points in which the line of action of the force is perpendicular. Image A shows the components, the force F, and the moment arm, x when they are perpendicular to one another. When the force is not perpendicular to the point of interest, such as Point O in Images B and C, the magnitude of the Moment, M of a vector F about the point O is

is the vector from point O to the position where quantity F is applied.Image C represents the vector components of the force in Image B. In order to determine the Moment, M of a vector F about the point O, when vector F is not perpendicular to point O, one must resolve the force F, into its horizontal and vertical components. The sum of the moments of the two components of F about the point O is :
The moment arm to the vertical component of F is a distance x. The moment arm to the horizontal component of F does not exist. There is no rotational force about point O due to the horizontal component of F. Thus, the moment arm distance is zero, or 0.[1]
Thus M can be referred to as "the moment M with respect to the axis that goes through the point O, or simply "the moment M about point O". If O is the origin, or, informally, if the axis involved is clear from context, one often omits O and says simply moment, rather than moment about O. Therefore, the moment about point O is indeed the cross product,
,since the cross product = F * x sin (θ)[1]
When F is the force, the moment of force is the torque as defined above.
) is analogous to mass in discussions of rotational motion.
) is the rotational analog of momentum.
) is a dipole moment measuring the strength and direction of a magnetic source.
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idioms:
Nederlands (Dutch)
ogenblik, moment, belang, tijdstip
Français (French)
n. - moment, instant, importance, (Phys) moment
idioms:
Deutsch (German)
n. - Augenblick, Moment
idioms:
Ελληνική (Greek)
n. - (χρονική) στιγμή, σπουδαιότητα, βαρύτητα, (φυσ.) ροπή
int. - μια στιγμή!
idioms:
Italiano (Italian)
momento, istante, rilievo
idioms:
Português (Portuguese)
n. - momento (m), conseqüência (f), fator essencial (m) (Filos.)
int. - só um momento!
idioms:
Русский (Russian)
момент, минута, определенное время, важность
idioms:
Español (Spanish)
n. - momento, instante, oportunidad, importancia
idioms:
Svenska (Swedish)
n. - ögonblick, betydelse, moment, beståndsdel
int. - ett ögonblick!
中文(简体)(Chinese (Simplified))
瞬间, 指定时刻, 片刻, 时机
idioms:
中文(繁體)(Chinese (Traditional))
n. - 瞬間, 指定時刻, 片刻, 時機
idioms:
한국어 (Korean)
n. - 순간, 위기, 중요성, 계기
idioms:
日本語 (Japanese)
n. - 瞬間, 時, 時期, 今, 現在, 運動率, 重要性
idioms:
العربيه (Arabic)
(الاسم) لحظه, أهميه
עברית (Hebrew)
n. - הרף-עין, רגע, נקודת-זמן מדויקת, חשיבות, מומנט, תנופה
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