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单词 blackout
释义

WordReference Random House Learner's Dictionary of American English © 2024
black•out /ˈblækˌaʊt/USA pronunciation   n. [countable]
  1. Militarythe turning off or covering over of all visible lights, usually as a precaution against air raids.
  2. Electricitya period of failure of all electrical power:A blackout is sometimes caused by an unusually heavy demand for electricity.
  3. Pathologya temporary loss of consciousness:After he fell he suffered a temporary blackout.
  4. complete stoppage of a television or radio broadcast, as by an electrical storm.

WordReference Random House Unabridged Dictionary of American English © 2024
black•out  (blak′out′),USA pronunciation n. 
  1. Militarythe extinguishing or concealment of all visible lights in a city, military post, etc., usually as a precaution against air raids.
  2. Electricitya period during a massive power failure when the lack of electricity for illumination results in utter darkness except from emergency sources, as candles.
  3. Show Business[Theat.]
    • the extinguishing of all stage lights, as in closing a vaudeville skit or separating the scenes of a play.
    • Also called black′out skit′. a skit ending in a blackout.
  4. Pathology
    • temporary loss of consciousness or vision:She suffered a blackout from the blow on the head.
    • a period of total memory loss, as one induced by an accident or prolonged alcoholic drinking:The patient cannot account for the bizarre things he did during his blackout.
  5. a brief, passing lapse of memory:An actor may have an occasional blackout and forget a line or two.
  6. complete stoppage of a communications medium, as by a strike, catastrophe, electrical storm, etc.:a newspaper blackout; a radio blackout.
  7. a stoppage, suppression, or obliteration:a news blackout.
  8. a period during which a special sales offer, fare rate, or other bargain is not available:The airline's discount on fares does not apply during the Christmas week blackout.
  9. Show Business[Radio and Television.]a prohibition that is imposed on the broadcasting of an event and has the purpose of encouraging or ensuring ticket sales.
  • noun, nominal use of verb, verbal phrase black out 1910–15

Collins Concise English Dictionary © HarperCollins Publishers::
blackout /ˈblækaʊt/ n
  1. the extinguishing or hiding of all artificial light, esp in a city visible to an enemy attack from the air
  2. a momentary loss of consciousness, vision, or memory
  3. a temporary electrical power failure or cut
  4. the suspension of radio or television broadcasting, as by a strike or for political reasons
 vb black out (adverb)
  1. (transitive) to obliterate or extinguish (lights)
  2. (transitive) to create a blackout in (a city etc)
  3. (intransitive) to lose vision, consciousness, or memory temporarily
  4. (tr, adverb) to stop (news, a television programme) from being released or broadcast
WordReference Random House Learner's Dictionary of American English © 2024
black /blæk/USA pronunciation   adj., -er, -est, n., v. 
adj. 
  1. lacking hue and brightness;
    absorbing light without reflecting any of its rays:black ink.
  2. characterized by absence of light;
    enveloped in darkness:a black night.
    3. [sometimes: Black]of, relating to, or belonging to any of the various populations having dark skin coloring, specifically the dark-skinned peoples of Africa, Oceania, and Australia. African-American (def. 2) :black Americans.
  3. soiled or stained with dirt.
  4. gloomy;
    pessimistic;
    dismal: a black future.
  5. Literature(of a play or writing) dealing with grim topics, esp. in a morbidly satirical way: black comedy.
  6. sullen or hostile: a blacklook.
  7. harmful, evil, or wicked: a black heart.
  8. Food(of coffee) served without milk or cream:black coffee.
  9. indicating disgrace or dishonor:a black mark.

n. [uncountable]
  1. Physicsthe color at one end of the gray scale, opposite to white.
  2. black clothing, esp. as a sign of mourning:She was dressed in black.

v. [~ + object]
  1. to make black;
    put black on;
    blacken:She blacked his eye with that one punch.
  2. black out,
    • [no object] to temporarily lose consciousness or memory:blacked out after they hit me on the head.
    • [~ + out + object] to hide or obscure (a city) by concealing all light in defense against air raids:blacked out the city by switching off all lights.
    • Show Business[~ + out + object] to impose a broadcast blackout on (an area):The network blacked out the New York City area.
Idioms
  1. Idioms in the black, operating at a profit:The company was operating in the black again.

black•ish, adj. 
    black, colored, and negro have all been used to describe or name dark-skinned African peoples or their descendants. colored, now somewhat old-fashioned, is often considered offensive. In the late 1950's black began to replace negro, and it is still the most widely used and accepted term. Common as both an adjective and a noun, black is usually not capitalized except in proper names or titles (Black Muslim; Black English). By the close of the 1980's African-American, urged by leaders in the American black community, had begun to replace black in both print and speech, esp. when used by American blacks to refer to themselves.

WordReference Random House Unabridged Dictionary of American English © 2024
black  (blak),USA pronunciation adj., -er, -est, n., v., adv. 
adj. 
  1. lacking hue and brightness;
    absorbing light without reflecting any of the rays composing it.
  2. characterized by absence of light;
    enveloped in darkness:a black night.
  3. Physical Anthropology(sometimes cap.)
    • pertaining or belonging to any of the various populations characterized by dark skin pigmentation, specifically the dark-skinned peoples of Africa, Oceania, and Australia.
    • African-American.
  4. soiled or stained with dirt:That shirt was black within an hour.
  5. gloomy;
    pessimistic;
    dismal:a black outlook.
  6. deliberately;
    harmful;
    inexcusable:a black lie.
  7. boding ill;
    sullen or hostile;
    threatening:black words; black looks.
  8. Food(of coffee or tea) without milk or cream.
  9. without any moral quality or goodness;
    evil;
    wicked:His black heart has concocted yet another black deed.
  10. indicating censure, disgrace, or liability to punishment:a black mark on one's record.
  11. marked by disaster or misfortune:black areas of drought; Black Friday.
  12. wearing black or dark clothing or armor:the black prince.
  13. Literature, Show Businessbased on the grotesque, morbid, or unpleasant aspects of life:black comedy; black humor.
  14. (of a check mark, flag, etc.) done or written in black to indicate, as on a list, that which is undesirable, sub-standard, potentially dangerous, etc.:Pilots put a black flag next to the ten most dangerous airports.
  15. illegal or underground:The black economy pays no taxes.
  16. showing a profit;
    not showing any losses:the first black quarter in two years.
  17. deliberately false or intentionally misleading:black propaganda.
  18. British Termsboycotted, as certain goods or products by a trade union.
  19. Metallurgy(of steel) in the form in which it comes from the rolling mill or forge;
    unfinished.
  20. Idioms black or white, completely either one way or another, without any intermediate state.

n. 
  1. Physicsthe color at one extreme end of the scale of grays, opposite to white, absorbing all light incident upon it. Cf. white (def. 20).
  2. Physical Anthropology(sometimes cap.)
    • a member of any of various dark-skinned peoples, esp. those of Africa, Oceania, and Australia.
    • African-American.
  3. black clothing, esp. as a sign of mourning:He wore black at the funeral.
  4. Chessthe dark-colored men or pieces or squares.
  5. black pigment:lamp black.
  6. Drugs, Slang Terms[Slang.]See black beauty. 
  7. Dog and Cat Breedsa horse or other animal that is entirely black.
  8. Idioms black and white:
    • print or writing:I want that agreement in black and white.
    • a monochromatic picture done with black and white only.
    • a chocolate soda containing vanilla ice cream.
  9. Idioms in the black, operating at a profit or being out of debt (opposed to in the red):New production methods put the company in the black.

v.t. 
  1. to make black;
    put black on;
    blacken.
  2. British Termsto boycott or ban.
  3. to polish (shoes, boots, etc.) with blacking.

v.i. 
  1. to become black;
    take on a black color;
    blacken.
  2. black out:
    • to lose consciousness:He blacked out at the sight of blood.
    • to erase, obliterate, or suppress:News reports were blacked out.
    • to forget everything relating to a particular event, person, etc.:When it came to his war experiences he blacked out completely.
    • Show Business[Theat.]to extinguish all of the stage lights.
    • to make or become inoperable:to black out the radio broadcasts from the U.S.
    • [Mil.]to obscure by concealing all light in defense against air raids.
    • Show Business[Radio and Television.]to impose a broadcast blackout on (an area).
    • to withdraw or cancel (a special fare, sale, discount, etc.) for a designated period:The special air fare discount will be blacked out by the airlines over the holiday weekend.

adv. 
  1. Food(of coffee or tea) served without milk or cream.
  • bef. 900; Middle English blak, Old English blæc; cognate with Old High German blah-; akin to Old Norse blakkr black, blek ink
black′ish, adj. 
black′ish•ly, adv. 
black′ish•ness, n. 
    • 1.See corresponding entry in Unabridged dark, dusky; sooty, inky; swart, swarthy; sable, ebony.
    • 4.See corresponding entry in Unabridged dirty, dingy.
    • 5.See corresponding entry in Unabridged sad, depressing, somber, doleful, mournful, funereal.
    • 7.See corresponding entry in Unabridged disastrous, calamitous.
    • 9.See corresponding entry in Unabridged sinful, inhuman, fiendish, devilish, infernal, monstrous; atrocious, horrible; nefarious, treacherous, traitorous, villainous.
    • 1.See corresponding entry in Unabridged white.
    • 4.See corresponding entry in Unabridged clean.
    • 5.See corresponding entry in Unabridged hopeful, cheerful.
    3, 22. Black, colored, and Negro have all been used to describe or name the dark-skinned African peoples or their descendants. Colored, now somewhat old-fashioned, is often offensive. In the late 1950s black began to replace Negro and today is the most widely used term. Common as an adjective (black woman, man, American, people, etc.), black is also used as a noun, especially in the plural. Like other terms referring to skin color (white, yellow), black is usually not capitalized, except in proper names or titles (Black Muslim; Black English). In the appropriate meanings Afro-American is sometimes used instead of black.

Black  (blak),USA pronunciation n. 
  1. Biographical Hugo Lafayette, 1886–1971, U.S. political official: associate justice of the U.S. Supreme Court 1937–71.
  2. Biographical Joseph, 1728–99, Scottish physician and chemist.
  3. Biographical Shirley Temple. See Temple, Shirley. 
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