POWER
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Pow"er (?), n. (Zo&ö;l.) Same as Poor, the fish.
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Pow"er, n. [OE. pouer, poer, OF. poeir, pooir, F. pouvoir, n. & v., fr. LL. potere, for L. posse, potesse, to be able, to have power. See Possible, Potent, and cf. Posse comitatus.] 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.” Milton.
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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.” Shak.
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3. Capacity of undergoing or suffering; fitness to be acted upon; susceptibility; -- called also passive power; as, great power of endurance.
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Power, then, is active and passive; faculty is active power or capacity; capacity is passive power.
Sir W. Hamilton.
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4. The exercise of a faculty; the employment of strength; the exercise of any kind of control; influence; dominion; sway; command; government.
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Power is no blessing in itself but when it is employed to protect the innocent.
Swift.
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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.” Milton.
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And the powers of the heavens shall be shaken.
Matt. xxiv. 29.
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6. A military or naval force; an army or navy; a great host. Spenser.
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Never such a power . . .
Was levied in the body of a land.
Shak.
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7. A large quantity; a great number; as, a power o&unr_; good things. [Colloq.] Richardson.
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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.
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&hand_; The English unit of power used most commonly is the horse power. See Horse power.
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(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.
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&hand_; This use in mechanics, of power as a synonym for force, is improper and is becoming obsolete.
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(d) A machine acted upon by an animal, and serving as a motor to drive other machinery; as, a dog power.
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&hand_; 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.
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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.
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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. I. Watts.
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The guiltiness of my mind, the sudden surprise of my powers, drove the grossness . . . into a received belief.
Shak.
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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.
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12. (Law) An authority enabling a person to dispose of an interest vested either in himself or in another person; ownership by appointment. Wharton.
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13. Hence, vested authority to act in a given case; as, the business was referred to a committee with power.
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&hand_; 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.
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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 co&ö;rdinates 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.
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