| 单词 | power |
| 释义 | power /pow"euhr/, n. 1. ability to do or act; capability of doing or accomplishing something. 2. political or national strength: the balance of power in Europe. 3. great or marked ability to do or act; strength; might; force. 4. the possession of control or command over others; authority; ascendancy: power over men's minds. 5. political ascendancy or control in the government of a country, state, etc.: They attained power by overthrowing the legal government. 6. legal ability, capacity, or authority: the power of attorney. 7. delegated authority; authority granted to a person or persons in a particular office or capacity: the powers of the president. 8. a document or written statement conferring legal authority. 9. a person or thing that possesses or exercises authority or influence. 10. a state or nation having international authority or influence: The great powers held an international conference. 11. a military or naval force: The Spanish Armada was a mighty power. 12. Often, powers. a deity; divinity: the heavenly powers. 13. powers, Theol. an order of angels. Cf. angel (def. 1). 14. Dial. a large number or amount: There's a power of good eatin' at the church social. 15. Physics. a. work done or energy transferred per unit of time. Symbol: P b. the time rate of doing work. 16. mechanical energy as distinguished from hand labor: a loom driven by power. 17. a particular form of mechanical or physical energy: hydroelectric power. 18. energy, force, or momentum: The door slammed shut, seemingly under its own power. 19. Math. a. the product obtained by multiplying a quantity by itself one or more times: The third power of 2 is 8. b. (of a number x) a number whose logarithm is a times the logarithm of x (and is called the ath power of x). Symbolically, y =xa is a number that satisfies the equation log y = a log x. c. the exponent of an expression, as a in xa. d. See cardinal number (def. 2). 20. Optics. a. the magnifying capacity of a microscope, telescope, etc., expressed as the ratio of the diameter of the image to the diameter of the object. Cf. magnification (def. 2). b. the reciprocal of the focal length of a lens. 21. the powers that be, those in supreme command; the authorities: The decision is in the hands of the powers that be. v.t. 22. to supply with electricity or other means of power: Atomic energy powers the new submarines. 23. to give power to; make powerful: An outstanding quarterback powered the team in its upset victory. 24. to inspire; spur; sustain: A strong faith in divine goodness powers his life. 25. (of a fuel, engine, or any source able to do work) to supply force to operate (a machine): An electric motor powers this drill. 26. to drive or push by applying power: She powered the car expertly up the winding mountain road. 27. power down, Computers. to shut off. 28. power up, Computers. to turn on. adj. 29. operated or driven by a motor or electricity: a power mower; power tools. 30. power-assisted: His new car has power brakes and power windows. 31. conducting electricity: a power cable. 32. Informal. expressing or exerting power; characteristic of those having authority or influence: to host a power lunch. [1250-1300; ME pouer(e), poer(e) < AF poueir, poer, n. use of inf.: to be able < VL *potere (r. L posse to be able, have power). See POTENT1] Syn. 1. capacity. 3. energy. See strength. 4, 5. sway, rule, sovereignty. Ant. 1. incapacity. 3. weakness. |
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