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单词 head off
释义

Collins Concise English Dictionary © HarperCollins Publishers::
head off vb (tr, adverb)
  1. to intercept and force to change direction
  2. to prevent or forestall (something that is likely to happen)
WordReference Random House Learner's Dictionary of American English © 2024
head /hɛd/USA pronunciation   n. [countable]
  1. Anatomythe upper part of the body, containing the skull with mouth, eyes, ears, nose, and brain:Nod your head.
  2. the head as the center of the intellect or as the controlling part of one's emotions;
    the mind:a good head for mathematics.
  3. the position or place of leadership, greatest authority, or honor:at the head of her class.
  4. a person in charge of others;
    chief:the head of the household.
  5. the part of anything thought of as forming the top or upper end:the head of a pin.
  6. the front end of something:the head of a procession.
  7. a person or animal considered as one of a number, herd, or group:[singular]ten head of cattle.
  8. a critical point in an activity where something must be done:to bring matters to a head.
  9. froth or foam at the top of a liquid:the head on a glass of beer.
  10. Botanyany dense flower cluster on a plant:a head of cabbage.
  11. Pathologythe top part of an abscess, boil, etc.
  12. Geographyheadland.
  13. CurrencyAlso, heads. the side of a coin that has a head or other principal figure (opposed to tail ).
  14. the source of a river or stream:The head of the Mississippi River is in Minnesota.
  15. Drugs, Slang Terms[Slang.]
    • a habitual user of an illegal drug (often used in combination with a noun):an acid-head.
  16. a toilet, esp. on a boat or ship.
  17. Hydraulicspressure:a head of steam.
  18. Sound Reproductionany of the parts of a tape recorder that record, play back, or erase magnetic signals on audiotape or videotape.

adj. [before a noun]
  1. first in rank or position:head cook.
  2. of or for the head (often used in combination with a noun):a head covering.
  3. Slang Termsof or relating to drugs, drug paraphernalia, or drug users:a head shop.

v. 
  1. to go at the head of or in front of:[~ + object]She headed the parade.
  2. to be in charge of:[~ (+ up) + object]to head (up) a school.
  3. to (cause to) move forward toward a point specified: [no object]The bus headed out of town.[~ + object]I'll head the boat for shore.
  4. head for, [~ + for + object] to move toward (something):heading for disaster.
  5. head off, to get in the path of or in front of in order to stop or turn aside;
    intercept: [~ + off + object]We headed off the robbers at the pass.[~ + object + off]We headed them off.
Idioms
  1. Idioms come to a head, to reach a critical point.
  2. Idioms get one's head together, [no object] to get oneself under control:Get your head together and stop dreaming.
  3. Idioms go over someone's head, [no object] to appeal to the superior of someone's own official superior:He angered his boss by going over his head to the president about his troubles.
  4. Idioms go to one's head:
    • to overcome a person with a feeling of joy or drunkenness:The liquor went straight to her head.
    • to fill one with conceit:Don't let your recent success go to your head.
  5. Idioms hang or hide one's head, to show a feeling of shame.
  6. Idioms head and shoulders, by an impressively great amount:head and shoulders above the rest in talent.
  7. head over heels:
    • Idiomsheadlong, as in a somersault:He fell head over heels into the pool.
    • Idiomsintensely;
      completely:head over heels in love.
  8. Idioms head to head, in direct opposition or competition:The two candidates went head to head in the primary.
  9. Idioms keep one's head, to remain calm and effective:The pilot kept her head when the plane lost power.
  10. Idioms keep one's head above water, to have enough money to continue to live or survive.
  11. Idioms lay or put heads together, [no object] to meet in order to consult or scheme:Let's put our heads together and see if there's some way we can work out a solution.
  12. Idioms lose one's head, to become uncontrolled or wildly excited.
  13. Idioms make head(s) or tail(s) of, [with a negative word or phrase* ~ + object] to understand or interpret to even a small extent:I can't make heads or tails of your message.
  14. Idioms make heads roll, [no object] to dismiss numbers of employees:The boss is going to make heads roll unless she gets results.
  15. Idioms one's head off, extremely;
    excessively:to laugh one's head off.
  16. Idioms on one's head, as one's responsibility or fault:It will be on his head if the plan fails.
  17. Idioms out of one's head or mind:
    • insane;
      irrational;
      crazy.
  18. Idioms over one's head, beyond one's understanding, ability, or resources.

head•ed, adj. 
head•less, adj. 

WordReference Random House Unabridged Dictionary of American English © 2024
head  (hed),USA pronunciation n. 
  1. Anatomythe upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.
  2. Zoologythe corresponding part of the body in other animals.
  3. the head considered as the center of the intellect, as of thought, memory, understanding, or emotional control;
    mind;
    brain:She has a good head for mathematics. Keep a cool head in an emergency.
  4. the position or place of leadership, greatest authority, or honor.
  5. a person to whom others are subordinate, as the director of an institution or the manager of a department;
    leader or chief.
  6. a person considered with reference to his or her mind, disposition, attributes, status, etc.:wise heads; crowned heads.
  7. that part of anything that forms or is regarded as forming the top, summit, or upper end:head of a pin; head of a page.
  8. the foremost part or front end of anything or a forward projecting part:head of a procession.
  9. the part of a weapon, tool, etc., used for striking:the head of a hammer.
  10. a person or animal considered merely as one of a number, herd, or group:ten head of cattle; a dinner at $20 a head.
  11. a culminating point, usually of a critical nature;
    crisis or climax:to bring matters to a head.
  12. Anatomythe hair covering the head:to wash one's head.
  13. froth or foam at the top of a liquid:the head on beer.
  14. [Bot.]
    • Botanyany dense flower cluster or inflorescence. See illus. under inflorescence. 
    • Botanyany other compact part of a plant, usually at the top of the stem, as that composed of leaves in the cabbage or lettuce, of leafstalks in the celery, or of flower buds in the cauliflower.
  15. Pathologythe maturated part of an abscess, boil, etc.
  16. a projecting point of a coast, esp. when high, as a cape, headland, or promontory.
  17. Currencythe obverse of a coin, as bearing a head or other principal figure (opposed to tail).
  18. one of the chief parts or points of a written or oral discourse;
    a main division of a subject, theme, or topic.
  19. something resembling a head in form or a representation of a head, as a piece of sculpture.
  20. the source of a river or stream.
  21. Drugs, Slang Terms[Slang.]
    • a habitual user of a drug, esp. LSD or marijuana (often used in combination):feds versus the heads;an acid-head;a pothead.
    • a fan or devotee (usually used in combination):a punk-rock head; a chili head.
  22. Wine heads, [Distilling.]alcohol produced during the initial fermentation. Cf. tail1 (def. 6d).
  23. Printingheadline.
  24. a toilet or lavatory, esp. on a boat or ship.
  25. Nautical, Naval Terms
    • the forepart of a vessel;
      bow.
    • the upper edge of a quadrilateral sail.
    • the upper corner of a jib-headed sail. See diag. under sail. 
    • Naval Termsthat part of the upper end of one spar of a mast that is overlapped by a spar above;
      a doubling at the upper end of a spar.
    • Naval Termsthat part of the upper end of a mast between the highest standing rigging and the truck.
    • crown (def. 28).
  26. Grammar
    • the member of an endocentric construction that belongs to the same form class and may play the same grammatical role as the construction itself.
    • the member upon which another depends and to which it is subordinate. In former presidents, presidents is head and former is modifier.
  27. Music and Dancethe stretched membrane covering the end of a drum or similar musical instrument.
  28. Mininga level or road driven into solid coal for proving or working a mine.
  29. Mechanical Engineering[Mach.]any of various devices on machine tools for holding, moving, indexing, or changing tools or work, as the headstock or turret of a lathe.
  30. Rail Transportrailhead (def. 3).
  31. Hydraulics(loosely) the pressure exerted by confined fluid:a head of steam.
  32. HydraulicsAlso called pressure head. 
    • the vertical distance between two points in a liquid, as water, or some other fluid
    • the pressure differential resulting from this separation, expressed in terms of the vertical distance between the points.
    • the pressure of a fluid expressed in terms of the height of a column of liquid yielding an equivalent pressure.
  33. Sound Reproduction, Electronics, ElectricityAlso called magnetic head. [Electronics.]the part or parts of a tape recorder that record, play back, or erase magnetic signals on magnetic tape. Cf. erasing head, playback head, recording head.
  34. ComputingSee read/write head. 
  35. [Photog.]
    • Photographya mounting for a camera, as on a tripod.
    • Photographythe part of an enlarger that contains the light source, negative carrier, lensboard, and lens.
  36. Slang Terms(vulgar). fellatio.
  37. [Archaic.]power, strength, or force progressively gathered or gradually attained.
  38. Nautical by or down by the head, so loaded as to draw more water forward than aft.
  39. Idioms come to a head:
    • to suppurate, as a boil.
    • to reach a crisis;
      culminate:The struggle for power came to a head.
  40. Idioms get one's head together, [Slang.]to have one's actions, thoughts, or emotions under control or in order:If he'd get his head together, maybe he'd get to work on time.
  41. Slang Terms give head, Slang (vulgar). perform fellatio.
  42. Idioms give someone his or her head, to permit someone to do as he or she likes;
    allow someone freedom of choice:She wanted to go away to college, and her parents gave her her head.
  43. Idioms go to someone's head:
    • to make someone dizzy or drunk;
      overcome one with excitement:Power went to his head. The brandy went to his head.
    • to make someone conceited or self-important:Success went to his head.
  44. Idioms hang one's head, to become dejected or ashamed:When he realized what an unkind thing he had done, he hung his head in shame.Also, hide one's head. 
  45. Idioms head and shoulders:
    • Idiomsfar better, more qualified, etc.;
      superior:In intelligence, he was head and shoulders above the rest of the children in the class.
    • [Archaic.]by force.
  46. head over heels:
    • Idiomsheadlong, as in a somersault:He tripped and fell head over heels into the gully.
    • Idiomsintensely;
      completely:head over heels in love.
    • Idiomsimpulsively;
      carelessly:They plunged head over heels into the fighting.
  47. heads up! [Informal.]be careful! watch out for danger!
  48. Idioms head to head, in direct opposition or competition:The candidates will debate head to head.
  49. Idioms keep one's head, to remain calm or poised, as in the midst of crisis or confusion:It was fortunate that someone kept his head and called a doctor.
  50. Idioms keep one's head above water, to remain financially solvent:Despite their debts, they are managing to keep their heads above water.
  51. Idioms lay or put heads together, to meet in order to discuss, consult, or scheme:Neither of them had enough money for a tour of Europe, so they put their heads together and decided to find jobs there.
  52. Idioms lose one's head, to become uncontrolled or wildly excited:When he thought he saw an animal in the underbrush, he lost his head and began shooting recklessly.
  53. Idioms make head, to progress or advance, esp. despite opposition;
    make headway:There have been many delays, but we are at last making head.
  54. Idioms make heads roll, to exert authority by firing or dismissing employees or subordinates:He made heads roll as soon as he took office.
  55. Idioms not make head or tail of, to be unable to understand or decipher:We couldn't make head or tail of the strange story.Also, not make heads or tails of. 
  56. Idioms off the top of one's head, candidly or extemporaneously:Off the top of my head, I'd say that's right.
  57. Idioms one's head off, extremely;
    excessively:We screamed our heads off at that horror movie. He laughed his head off at the monkey's antics.
  58. Idioms on one's head, as one's responsibility or fault:Because of his reckless driving he now has the deaths of three persons on his head.
  59. Idioms out of one's head or mind:
    • insane;
      crazy.
    • [Informal.]delirious;
      irrational:You're out of your head if you accept those terms.
  60. Idioms over one's head:
    • beyond one's comprehension, ability, or resources:The classical allusion went right over his head.
    • beyond one's financial resources or ability to pay:He's lost over his head in that poker game.
  61. Idioms over someone's head, to appeal to someone having a superior position or prior claim:She went over her supervisor's head and complained to a vice president.
  62. British Terms, Idioms pull one's head in, [Australian Slang.]to keep quiet or mind one's own business;
    shut up.
  63. Idioms take it into one's head, to form a notion, purpose, or plan:She took it into her head to study medicine.Also, take into one's head. 
  64. Idioms turn someone's head:
    • to cause someone to become smug or conceited:Her recent success has completely turned her head.
    • to cause one to become foolish or confused:A whirlwind romance has quite turned his head.

adj. 
  1. first in rank or position;
    chief;
    leading;
    principal:a head official.
  2. of, pertaining to, or for the head (often used in combination):head covering;headgear;headpiece.
  3. situated at the top, front, or head of anything (often used in combination):headline; headboard.
  4. Nautical, Naval Termsmoving or coming from a direction in front of the head or prow of a vessel:head sea;head tide;head current.
  5. Slang Termsof or pertaining to drugs, drug paraphernalia, or drug users.

v.t. 
  1. to go at the head of or in front of;
    lead;
    precede:to head a list.
  2. to outdo or excel;
    take the lead in or over:to head a race; to head one's competitors in a field.
  3. to be the head or chief of (sometimes fol. by up):to head a school; to head up a department.
  4. to direct the course of;
    turn the head or front of in a specified direction:I'll head the boat for the shore. Head me in the right direction and I'll walk to the store.
  5. to go around the head of (a stream).
  6. to furnish or fit with a head.
  7. to take the head off;
    decapitate;
    behead.
  8. Botanyto remove the upper branches of (a tree).
  9. Sport[Fox Hunting.]to turn aside (a fox) from its intended course.
  10. to get in front of in order to stop, turn aside, attack, etc.
  11. headline (def. 4).
  12. Sport[Soccer.]to propel (the ball) by striking it with the head, esp. with the forehead.

v.i. 
  1. to move forward toward a point specified;
    direct one's course;
    go in a certain direction:to head toward town.
  2. to come or grow to a head;
    form a head:Cabbage heads quickly.
  3. (of a river or stream) to have the head or source where specified.
  4. head off, to go before in order to hinder the progress of;
    intercept:The police headed off the fleeing driver at a railroad crossing.
  • bef. 900; Middle English he(v)ed, Old English hēafod; cognate with Old High German houbit, Gothic haubith; akin to Old English hafud- (in hafudland headland), Old Norse hǫfuth, Latin caput (see capital1)
head′like′, adj. 
    • 5.See corresponding entry in Unabridged commander, superior, master, principal, superintendent, president, chairman.
    • 65.See corresponding entry in Unabridged cardinal, foremost, supreme, main.
    • 71.See corresponding entry in Unabridged surpass, beat.
    • 72.See corresponding entry in Unabridged direct, command, rule, govern.
    • 1.See corresponding entry in Unabridged foot.
    • 65.See corresponding entry in Unabridged subordinate.

-head, 
  1. a native English suffix meaning "state of being'' (godhead;
    maidenhead    ), occurring in words now mostly archaic or obsolete, many being superseded by forms in -hood. 
  • Middle English -hede, Old English *-hǣdu, f. of -hād -hood
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