| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024fast1 /fæst/USA pronunciation adj. andadv., -er, -est. adj. - moving or able to move, operate, function, or take effect quickly;
quick;
swift;
rapid:a fast horse. - done in or taking comparatively little time:a fast race.
- Time(of a timepiece) indicating a time in advance of the correct time:My watch is fast.
- characterized by unrestrained or immoral conduct, esp. in sexual relations;
wanton;
loose:a fast crowd. - characterized by extreme energy and activity, esp. in the pursuit of pleasure:leading a fast life.
- permanent, lasting, or unchangeable:a fast color.
- resistant (often used in combination):acid-fast; Her clothes are color-fast (=won't lose color when washed).
- firm;
loyal;
devoted:fast friends. - Informal Terms
- (of money, profits, etc.) made quickly or easily and sometimes deviously:They made a few fast profits.
- cleverly quick and manipulative in making money:a fast operator.
adv. - quickly, swiftly, or rapidly:She drove very fast.
- tightly;
firmly:held on fast to my hand; caught fast in a trap. - in a fixed and secure way, as a door, gate, or shutter:The door was shut fast and locked.
- soundly:He was fast asleep.
- ahead of the correct or announced time:My alarm clock is running fast.
Idioms- Idioms pull a fast one, to engage in unexpectedly unfair or deceitful behavior to achieve one's goal:He pulled a fast one by sabotaging my computer files.
fast2 /fæst/USA pronunciation v. [no object]- to eat no food.
- to eat only a little or only certain kinds of food, esp. as a religious observance.
n. [countable] - an act or a period of not eating food, or a limiting of one's food.
WordReference Random House Unabridged Dictionary of American English © 2024fast1 (fast, fäst),USA pronunciation adj., -er, -est, adv., -er, -est, n. adj. - moving or able to move, operate, function, or take effect quickly;
quick;
swift;
rapid:a fast horse;a fast pain reliever;a fast thinker. - done in comparatively little time;
taking a comparatively short time:a fast race; fast work. - Time(of time)
- indicating a time in advance of the correct time, as of a clock.
- noting or according to daylight-saving time.
- adapted to, allowing, productive of, or imparting rapid movement:a hull with fast lines; one of the fastest pitchers in baseball.
- characterized by unrestrained conduct or lack of moral conventions, esp. in sexual relations;
wanton;
loose:Some young people in that era were considered fast, if not downright promiscuous. - characterized by hectic activity:leading a fast life.
- resistant:acid-fast.
- firmly fixed in place;
not easily moved;
securely attached. - held or caught firmly, so as to be unable to escape or be extricated:an animal fast in a trap.
- firmly tied, as a knot.
- closed and made secure, as a door, gate, or shutter.
- such as to hold securely:to lay fast hold on a thing.
- firm in adherence;
loyal;
devoted:fast friends. - permanent, lasting, or unchangeable:a fast color; a hard and fast rule.
- Informal Terms
- (of money, profits, etc.) made quickly or easily and sometimes deviously:He earned some fast change helping the woman with her luggage.
- cleverly quick and manipulative in making money:a fast operator when it comes to closing a business deal.
- [Photog.]
- Photography(of a lens) able to transmit a relatively large amount of light in a relatively short time.
- Photography(of a film) requiring a relatively short exposure time to attain a given density.
- Sport[Horse Racing.]
- (of a track condition) completely dry.
- (of a track surface) very hard.
- Informal Terms, Idioms pull a fast one, to play an unfair trick;
practice deceit:He tried to pull a fast one on us by switching the cards.
adv. - quickly, swiftly, or rapidly.
- in quick succession:Events followed fast upon one another to the crisis.
- tightly;
firmly:to hold fast. - soundly:fast asleep.
- in a wild or dissipated way.
- ahead of the correct or announced time.
- [Archaic.]close;
near:fast by. - Idioms play fast and loose. See play (def. 76).
n. - a fastening for a door, window, or the like.
- bef. 900; Middle English; Old English fæst firm; cognate with Dutch vast, Old Norse fastr firm, German fest; akin to fast2
- 1, 2.See corresponding entry in Unabridged fleet, speedy. See quick.
- 5.See corresponding entry in Unabridged dissipated, dissolute, profligate, immoral; wild, prodigal.
- 8.See corresponding entry in Unabridged secure, tight, immovable, firm.
- 9.See corresponding entry in Unabridged inextricable.
- 13.See corresponding entry in Unabridged faithful, steadfast.
- 14.See corresponding entry in Unabridged enduring.
- 21.See corresponding entry in Unabridged securely, fixedly, tenaciously.
- 23.See corresponding entry in Unabridged recklessly, wildly, prodigally.
- 1, 2.See corresponding entry in Unabridged slow.
- 5, 6.See corresponding entry in Unabridged restrained.
- 8.See corresponding entry in Unabridged loose.
fast2 (fast, fäst),USA pronunciation v.i. - to abstain from all food.
- to eat only sparingly or of certain kinds of food, esp. as a religious observance.
v.t. - to cause to abstain entirely from or limit food;
put on a fast:to fast a patient for a day before surgery.
n. - an abstinence from food, or a limiting of one's food, esp. when voluntary and as a religious observance;
fasting. - a day or period of fasting.
- bef. 1000; Middle English fasten, Old English fæstan; cognate with German fasten, Gothic fastan, Old Norse fasta
- Nautical, Naval Termsa chain or rope for mooring a vessel.
- Old Norse festr mooring rope
- alteration, by association with fast1, of late Middle English fest, perh. noun, nominal use of fest, past participle of festen to fasten, or 1670–80
Collins Concise English Dictionary © HarperCollins Publishers:: fast /fɑːst/ adj - acting or moving or capable of acting or moving quickly; swift
- accomplished in or lasting a short time: fast work, a fast visit
- (prenominal) adapted to or facilitating rapid movement: the fast lane of a motorway
- (of a clock, etc) indicating a time in advance of the correct time
- given to an active dissipated life
- of or characteristic of such activity: a fast life
- not easily moved; firmly fixed; secure
- firmly fastened, secured, or shut
- steadfast; constant (esp in the phrase fast friends)
- (of a playing surface, running track, etc) conducive to rapid speed, as of a ball used on it or of competitors playing or racing on it
- that will not fade or change colour readily: a fast dye
- proof against fading
- requiring a relatively short time of exposure to produce a given density: a fast film
- permitting a short exposure time: a fast shutter
- informal a deceptive or unscrupulous trick (esp in the phrase pull a fast one)
- fast worker ⇒ a person who achieves results quickly, esp in seductions
adv - quickly; rapidly
- soundly; deeply: fast asleep
- firmly; tightly
- in quick succession
- in advance of the correct time: my watch is running fast
- in a reckless or dissipated way
- fast by, fast beside ⇒ archaic close or hard by; very near
- play fast and loose ⇒ informal to behave in an insincere or unreliable manner
Etymology: Old English fæst strong, tight; related to Old High German festi firm, Old Norse fastr fast /fɑːst/ vb - (intransitive) to abstain from eating all or certain foods or meals, esp as a religious observance
n - an act or period of fasting
- (as modifier): a fast day
Etymology: Old English fæstan; related to Old High German fastēn to fast, Gothic fastanˈfaster n |