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单词 rollover
释义

WordReference Random House Learner's Dictionary of American English © 2024
roll•o•ver /ˈroʊlˌoʊvɚ/USA pronunciation  n. [countable]
  1. Businessthe moving of money into a new investment, such as from one stock or bond into another.

WordReference Random House Learner's Dictionary of American English © 2024
roll /roʊl/USA pronunciation   v. 
  1. to move along a surface by turning over and over: [no object]A huge stone rolled down the hill.[~ + object]They rolled a huge stone down on their enemies.
  2. to move or be moved on wheels: [~ + object]He rolled the car a few feet from the edge of the cliff.[no object]The car rolled to a stop.
  3. to (cause to) flow with a continuing or swaying motion: [no object]Tears rolled down her face.[~ + object]The waves were rolling the ship up and down.
  4. to extend in waves, as land:[no object]The hills rolled into the distance.
  5. to move along or elapse, as time:[no object]The years rolled by, and before we knew it she was all grown up.
  6. to make or have a deep, continuing sound, as thunder: [no object]The drums rolled and the parade began.[~ + object]to roll their drums.
  7. (of the eyes) to turn around in different directions: [no object]His eyes rolled wildly in his head.[~ + object]He rolled his eyes and looked up.
  8. Informal Terms[no object]
    • to begin to move or operate:Let's roll at sunrise.
    • to make progress;
      advance:The project is really rolling now.
  9. to curl, cover, or fold up so as to form a rounded object: [~ + object]to roll a ball of string; She rolled the string into a ball.[no object* ~ + up]The map rolls up easily.[~ + up + object]He rolled up the map.[~ + object + up]He rolled the map up.
  10. to trill:[~ + object]to roll one'sr's.
  11. to spread out flat, as with a rolling pin: [~ + object]She rolled the pastry dough and made a pie crust.[~ + out + object]He rolled out the pizza dough.[~ + object + out]He rolled the dough out and added sauce and cheese.
  12. (in certain games, as craps) to throw (dice): [~ + object]He rolled a seven.[no object]Whose turn is it to roll?
  13. Slang Terms[~ + object]to rob, esp. by going through the pockets of a victim who is asleep or drunk.
  14. roll back, to reduce (prices, etc.) to a former level: [~ + back + object]The company wants to roll back wages and benefits.[~ + object + back]The company wants to roll wages back to pre-1993 rates.
  15. roll in:
    • [no object][Informal.]to arrive, esp. in large quantity:When does the money start rolling in?See rolling below.
  16. roll over:
    • to turn over, as a person lying down: [no object]She groaned, rolled over, and went back to sleep.[~ + over + object]We rolled over the body and examined the wound.[~ + object + over]to roll it over.
    • to reinvest (funds), as from one stock into another: [~ + over + object]How do you know when it's a good time to roll over the funds?[~ + object + over]to roll the funds over.[no object]When the funds roll over, the profit will be yours to keep.
  17. roll up:
    • to fold the edges of (sleeves, cuffs, etc.): [~ + up + object]Roll up your sleeves and let's get to work.[~ + object + up]Roll your pants up and step into the water.
    • to gather in increasing amounts: [~ + up + object]The company continues to roll up massive profits.[~ + object + up]to keep rolling them up.[no object]Profits kept rolling up.
    • [no object] to arrive in a car, etc.:She rolled up in a huge limousine.

n. [countable]
  1. a register, catalog, or list, as of a class:The teacher called the roll but my name wasn't on it.
  2. anything rolled up in a ringlike or long, rounded form, as a length of cloth, wallpaper, etc.:a roll of Scotch tape.
  3. a rounded mass of something:rolls of fat on his stomach.
  4. Fooda small cake of bread folded over before baking:coffee and a roll.
  5. an act or instance of rolling or swaying:the sickening roll of the ship.
  6. a deep, long sound, as of thunder or drums:a roll of thunder.
Idioms
  1. Idioms, Games on a roll, experiencing a time of success:She's on a roll now; everything is going her way.
  2. Idioms, roll with the punches, to deal with difficulty by remaining flexible.


WordReference Random House Unabridged Dictionary of American English © 2024
roll  (rōl),USA pronunciation v.i. 
  1. to move along a surface by revolving or turning over and over, as a ball or a wheel.
  2. to move or be moved on wheels, as a vehicle or its occupants.
  3. to flow or advance in a stream or with an undulating motion, as water, waves, or smoke.
  4. to extend in undulations, as land.
  5. to elapse, pass, or move, as time (often fol. by on, away, or by).
  6. to move as in a cycle (usually fol. by round or around):as soon as summer rolls round again.
  7. Astronomyto perform a periodical revolution in an orbit, as a heavenly body.
  8. to emit or have a deep, prolonged sound, as thunder, drums, etc.
  9. to trill, as a bird.
  10. to revolve or turn over, once or repeatedly, as a wheel on an axis or a person or animal lying down.
  11. to turn around in different directions or in a circle, as the eyes in their sockets.
  12. (of a vessel)
    • Naval Termsto rock from side to side in open water. Cf. heave (def. 14b), pitch 1 (def. 20).
    • Naval Termsto sail with a side-to-side rocking motion.
  13. to walk with a swinging or swaying gait.
  14. Informal Termsto begin to move or operate;
    start;
    commence:Let's roll at sunrise.
  15. Informal Termsto go forward or advance without restrictions or impediments:The economy is finally beginning to roll.
  16. to curl up so as to form a tube or cylinder.
  17. to admit of being formed into a tube or cylinder by curling up.
  18. to be spread out after being curled up (usually fol. by out).
  19. to spread out as under a roller:The paint rolls easily.
  20. Aeronautics[Aviation.](of an aircraft or rocket) to deviate from a stable flight attitude by rotation about its longitudinal axis.

v.t. 
  1. to cause to move along a surface by revolving or turning over and over, as a cask, a ball, or a hoop.
  2. Transportto move along on wheels or rollers;
    convey in a wheeled vehicle.
  3. to drive, impel, or cause to flow onward with a sweeping or undulating motion:The wind rolled the waves high on the beach.
  4. to utter or give forth with a full, flowing, continuous sound:rolling his orotund phrases.
  5. to trill:to roll one'sr's.
  6. to cause to revolve or turn over or over and over:to roll oneself on one's face.
  7. to cause to sway or rock from side to side, as a ship.
  8. to wrap (something) around an axis, around upon itself, or into a cylindrical shape, ball, or the like:to roll string.
  9. to make by forming a tube or cylinder:to roll a cigarette.
  10. to spread out flat (something curled up) (often fol. by out):He rolled the map out on the table.
  11. to wrap, enfold, or envelop, as in some covering:to roll a child in a blanket.
  12. to spread out, level, smooth, compact, or the like, as with a rolling pin, roller, the hands, etc.:to roll dough; to roll a tennis court.
  13. Metallurgyto form (metal) in a rolling mill.
  14. Metallurgyto tumble (metal pieces and abrasives) in a box or barrel in such a way that their relative positions remain the same.
  15. to beat (a drum) with rapid, continuous strokes.
  16. (in certain games, as craps) to cast, or throw (dice).
  17. Printingto apply (ink) with a roller or series of rollers.
  18. Slang Termsto rob, esp. by going through the pockets of a victim who is either asleep or drunk.
  19. roll back, to reduce (the price of a commodity, wages, etc.) to a former level, usually in response to government action.
  20. roll in, [Informal.]
    • to luxuriate in;
      abound in:rolling in money.
    • to go to bed;
      retire:They would roll in later and later every night.
    • to mix and average the cost of (a higher-priced commodity or item) with that of a cheaper one so as to increase the retail price.
    • to add:Labor wants to roll in periodic increases with their wage demands.
    • to arrive, esp. in large numbers or quantity:When do my dividends start rolling in?
  21. roll one's eyes, to turn one's eyes around in different directions or in a circle, esp. as an expression of disbelief, annoyance, or impatience:He rolled his eyes when he heard the stupid joke.
  22. roll out:
    • to spread out or flatten:to roll out dough.
    • [Informal.]to arise from bed;
      get up:It was nearly impossible to roll out on the first day back after vacation.
    • Sport[Football.]to execute a rollout.
    • [Informal.]to introduce;
      unveil:a TV advertising campaign to roll out the new car.
  23. roll up:
    • to accumulate;
      collect:to roll up a large vote.
    • to increase.
    • to arrive in a conveyance:He rolled up to the front door in a chauffeur-driven limousine.
  24. roll with the punches. See punch 1 (def. 4).

n. 
  1. Printinga document of paper, parchment, or the like, that is or may be rolled up, as for storing;
    scroll.
  2. a list, register, or catalog, esp. one containing the names of the persons belonging to a company, class, society, etc.
  3. anything rolled up in a ringlike or cylindrical form:a roll of wire.
  4. Printinga number of papers or other items rolled up together.
  5. a length of cloth, wallpaper, or the like, rolled up in cylindrical form (often forming a definite measure).
  6. a cylindrical or rounded mass of something:rolls of fat.
  7. some article of cylindrical or rounded form, as a molding.
  8. a cylindrical piece upon which something is rolled along to facilitate moving.
  9. a cylinder serving as a core upon which something is rolled up.
  10. Mechanical Engineeringa roller with which something is spread out, leveled, crushed, smoothed, compacted, or the like.
  11. Food[Cookery.]
    • thin cake spread with jelly or the like and rolled up.
    • Fooda small cake of bread, originally and still often rolled or doubled on itself before baking.
    • meat rolled up and cooked.
  12. the act or process or an instance of rolling.
  13. undulation, as of a surface:the roll of a prairie.
  14. a sonorous or rhythmical flow of words.
  15. a deep, prolonged sound, as of thunder:the deep roll of a breaking wave.
  16. Animal Behaviorthe trill of certain birds, esp. of the roller canary.
  17. the continuous sound of a drum rapidly beaten.
  18. Nautical, Naval Termsa rolling motion, as of a ship.
  19. a rolling or swaying gait.
  20. [Aerospace.]
    • a single, complete rotation of an airplane about the axis of the fuselage with little loss of altitude or change of direction.
    • (of an aircraft or rocket) the act of rolling.
    • the angular displacement caused by rolling.
  21. [Informal.]
    • paper currency carried folded or rolled up:He took out an impressive roll and paid the check with a $100 bill.
    • bankroll;
      funds:People were encouraged to shoot their rolls on mining speculation.
  22. (in various dice games)
    • a single cast of or turn at casting the dice.
    • the total number of pips or points made by a single cast;
      score or point.
  23. Games on a roll:
    • (in a gambling game) having a continuing winning streak.
    • enjoying continuing good luck or success:She's been on a roll since taking that course on sales techniques.
  24. roll in the hay, [Slang.]an instance of sexual intercourse.
  25. strike off or from the rolls, to remove from membership or practice, as to disbar:He will surely be struck off the rolls if this conduct continues.
  • Vulgar Latin *rotulare, derivative of Latin rotulus, rotula
  • Old French rol(l)er
  • Latin rotulus, rotula small wheel, diminutive of rota wheel (see rotate, -ule); (in senses referring to motion) derivative of the verb, verbal; (verb, verbal) Middle English rollen
  • Old French ro(u)lle
  • (noun, nominal) (in senses referring to rolled or round objects) Middle English: scroll, inscribed scroll, register, cylindrical object 1175–1225
roll′a•ble, adj. 
    • 1.See corresponding entry in Unabridged revolve, rotate.
    • 3.See corresponding entry in Unabridged wave, undulate.
    • 4.See corresponding entry in Unabridged undulate.
    • 12.See corresponding entry in Unabridged swing, tilt.
    • 46.See corresponding entry in Unabridged See list 1.
    • 53.See corresponding entry in Unabridged spindle.

Collins Concise English Dictionary © HarperCollins Publishers::
roll over vb (adverb)
  1. (intransitive) to overturn
  2. (transitive) to allow (a loan, prize, etc) to continue in force for a further period
 n rollover
  1. an instance of such continuance of a loan, prize, etc
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更新时间：2024/11/10 12:14:57