pow·er /ˈpaʊ(ə)r/ 名詞
功率 冪 電力
Pow·er n. Zool. Same as Poor, the fish.
1. Ability to act, regarded as latent or inherent; the faculty of doing or performing something; capacity for action or performance; capability of producing an effect, whether physical or moral: potency; might; as, a man of great power; the power of capillary attraction; money gives power. “One next himself in power, and next in crime.”
2. Ability, regarded as put forth or exerted; strength, force, or energy in action; as, the power of steam in moving an engine; the power of truth, or of argument, in producing conviction; the power of enthusiasm. “The power of fancy.”
3. Capacity of undergoing or suffering; fitness to be acted upon; susceptibility; -- called also passive power; as, great power of endurance.
Power, then, is active and passive; faculty is active power or capacity; capacity is passive power. --Sir W. Hamilton.
4. The exercise of a faculty; the employment of strength; the exercise of any kind of control; influence; dominion; sway; command; government.
Power is no blessing in itself but when it is employed to protect the innocent. --Swift.
5. The agent exercising an ability to act; an individual invested with authority; an institution, or government, which exercises control; as, the great powers of Europe; hence, often, a superhuman agent; a spirit; a divinity. “The powers of darkness.”
And the powers of the heavens shall be shaken. --Matt. xxiv. 29.
6. A military or naval force; an army or navy; a great host.
Never such a power . . .
Was levied in the body of a land. --Shak.
7. A large quantity; a great number; as, a power o░ good things. [Colloq.]
8. Mech. (a) The rate at which mechanical energy is exerted or mechanical work performed, as by an engine or other machine, or an animal, working continuously; as, an engine of twenty horse power.
Note: ☞ The English unit of power used most commonly is the horse power. See Horse power.
(b) A mechanical agent; that from which useful mechanical energy is derived; as, water power; steam power; hand power, etc. (c) Applied force; force producing motion or pressure; as, the power applied at one and of a lever to lift a weight at the other end.
Note: ☞ This use in mechanics, of power as a synonym for force, is improper and is becoming obsolete.
(d) A machine acted upon by an animal, and serving as a motor to drive other machinery; as, a dog power.
Note: ☞ Power is used adjectively, denoting, driven, or adapted to be driven, by machinery, and not actuated directly by the hand or foot; as, a power lathe; a power loom; a power press.
9. Math. The product arising from the multiplication of a number into itself; as, a square is the second power, and a cube is third power, of a number.
10. Metaph. Mental or moral ability to act; one of the faculties which are possessed by the mind or soul; as, the power of thinking, reasoning, judging, willing, fearing, hoping, etc.
The guiltiness of my mind, the sudden surprise of my powers, drove the grossness . . . into a received belief. --Shak.
11. Optics The degree to which a lens, mirror, or any optical instrument, magnifies; in the telescope, and usually in the microscope, the number of times it multiplies, or augments, the apparent diameter of an object; sometimes, in microscopes, the number of times it multiplies the apparent surface.
12. Law An authority enabling a person to dispose of an interest vested either in himself or in another person; ownership by appointment.
13. Hence, vested authority to act in a given case; as, the business was referred to a committee with power.
Note: ☞ Power may be predicated of inanimate agents, like the winds and waves, electricity and magnetism, gravitation, etc., or of animal and intelligent beings; and when predicated of these beings, it may indicate physical, mental, or moral ability or capacity.
Mechanical powers. See under Mechanical.
Power loom, or Power press. See Def. 8 (d), note.
Power of attorney. See under Attorney.
Power of a point (relative to a given curve) Geom., the result of substituting the coordinates of any point in that expression which being put equal to zero forms the equation of the curve; as, x² + y² - 100 is the power of the point x, y, relative to the circle x² + y² - 100 = 0.
n 1: possession of controlling influence; "the deterrent power of
nuclear weapons"; "the power of his love saved her";
"his powerfulness was concealed by a gentle facade"
[syn: powerfulness] [ant: powerlessness, powerlessness]
2: (physics) the rate of doing work; measured in watts (=
3: possession of the qualities (especially mental qualities)
required to do something or get something done; "danger
heightened his powers of discrimination" [syn: ability]
4: a state powerful enough to influence events throughout the
world [syn: world power, major power, great power, superpower]
5: (of a government or government official) holding an office
means being in power; "being in office already gives a
candidate a great advantage"; "during his first year in
office"; "during his first year in power"; "the power of
the president" [syn: office]
6: one possessing or exercising power or influence or
authority; "the mysterious presence of an evil power";
"may the force be with you"; "the forces of evil" [syn: force]
7: physical strength [syn: might, mightiness]
8: a mathematical notation indicating the number of times a
quantity is multiplied by itself [syn: exponent, index]
9: a very wealthy or powerful businessman; "an oil baron" [syn:
baron, big businessman, business leader, king, magnate,
mogul, top executive, tycoon]
v : supply the force or power for the functioning of; "The
gasoline powers the engines"