fast

[ fast, fahst ]

/ fæst, fɑst /

See synonyms for: fast / faster / fastest / fasting on Thesaurus.com

adjective, fast·er, fast·est.

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.

(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, especially 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.

(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.

Photography.

(of a lens) able to transmit a relatively large amount of light in a relatively short time.
(of a film) requiring a relatively short exposure time to attain a given density.

Horse Racing.

(of a track condition) completely dry.
(of a track surface) very hard.

adverb, fast·er, fast·est.

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.

noun

a fastening for a door, window, or the like.

SYNONYMS FOR fast

1, 2 fleet, speedy.

5 dissipated, dissolute, profligate, immoral; wild; prodigal.

8 secure, tight, immovable, firm.

9 inextricable.

13 faithful, steadfast.

14 enduring.

20 securely, fixedly, tenaciously.

22 recklessly, wildly, prodigally.

See synonyms for fast on Thesaurus.com

ANTONYMS FOR fast

1, 2 slow.

5, 6 restrained.

8 loose.

See antonyms for fast on Thesaurus.com

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Idioms for fast

play fast and loose. play (def. 80).

pull a fast one, Informal. to play an unfair trick; practice deceit: He tried to pull a fast one on us by switching the cards.

Origin of fast

First recorded before 900; Middle English; Old English fæst “firm”; cognate with Dutch vast, Old Norse fastr “firm,” German fest; akin to fast²

synonym study for fast

1, 2. See quick.

Definition for fast (2 of 3)

fast²

[ fast, fahst ]

/ fæst, fɑst /

verb (used without object)

to abstain from all food.

to eat only sparingly or of certain kinds of food, especially as a religious observance.

verb (used with object)

to cause to abstain entirely from or limit food; put on a fast: to fast a patient for a day before surgery.

noun

an abstinence from food, or a limiting of one's food, especially when voluntary and as a religious observance; fasting.

a day or period of fasting.

Origin of fast

First recorded before 1000; Middle English fasten, festen, Old English fæstan; cognate with German fasten, Gothic fastan, Old Norse fasta

OTHER WORDS FROM fast

un·fast·ing, adjective

Definition for fast (3 of 3)

fast³

[ fast, fahst ]

/ fæst, fɑst /

noun

a chain or rope for mooring a vessel.

Origin of fast

First recorded in 1670–80; alteration, by association with fast¹ (in the sense “firmly tied”), of late Middle English fest “fastening, mooring rope,” from Old Norse festr “mooring rope, cable,” from Old Norse fastr “fixed, firm”; cf. fasten, fast¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for fast

Their clear priorities : faster economic growth and promoting upward mobility for the middle and working classes.
Time to Bring Back the Truman Democrats|Joel Kotkin|December 21, 2014|DAILY BEAST
When he next tried out for the varsity, he weighed 174 pounds and was faster than he had been on his arrival at West Point.
How His West Point Football Experience Inspired Eisenhower|Nicolaus Mills|November 11, 2014|DAILY BEAST
The cars had plush green upholstery and stained-glass windows and were faster and cheaper than a horse-and-buggy.
Those Kansas City Blues: A Family History|Katie Baker|October 24, 2014|DAILY BEAST
This will be a temporary position—to help us get started and to respond to the “We need to do more, we need to do it faster.”
Meet America’s New Top Ebola Fighter|Abby Haglage|September 26, 2014|DAILY BEAST

They know this is a rotten deal and they are demoralized, running faster and faster with no hope of catching up.
Why Your Doctor Feels Like a 'Beaten Dog'|Daniela Drake|September 11, 2014|DAILY BEAST
Higher and higher—faster and faster—till with a stunning, ear-deafening crash she struck the great dome and was through.
The Affair of the Brains|Anthony Gilmore
The ground dropped slowly away, then faster; and as we swung about I saw the hilltop beneath us.
Tarrano the Conqueror|Raymond King Cummings
The quahaugs which have the better current or circulation of water show the faster growth.
A Report upon the Mollusk Fisheries of Massachusetts|Commissioners on Fisheries and Game
The faster it is going the further it goes before this drop is sufficient to be noticeable.
The Modern Pistol and How to Shoot It|Walter Winans
No one could have driven her faster than he drove her, and the pace satisfied even his uneasy mind.
Labrador Days|Wilfred Thomason Grenfell

British Dictionary definitions for fast (1 of 2)

fast¹

/ (fɑːst) /

adjective

acting or moving or capable of acting or moving quickly; swift

accomplished in or lasting a short timefast work; a fast visit

(prenominal) adapted to or facilitating rapid movementthe fast lane of a motorway

requiring rapidity of action or movementa fast sport

(of a clock, etc) indicating a time in advance of the correct time

given to an active dissipated life

of or characteristic of such activitya fast life

not easily moved; firmly fixed; secure

firmly fastened, secured, or shut

steadfast; constant (esp in the phrase fast friends)

sport (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 readilya fast dye

proof against fadingthe colour is fast to sunlight
(in combination)washfast

photog

requiring a relatively short time of exposure to produce a given densitya fast film
permitting a short exposure timea fast shutter

cricket (of a bowler) characteristically delivering the ball rapidly

informal glib or unreliable; deceptivea fast talker

archaic sound; deepa fast sleep

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

adverb

quickly; rapidly

soundly; deeplyfast asleep

firmly; tightly

in quick succession

in advance of the correct timemy watch is running fast

in a reckless or dissipated way

fast by or fast beside archaic close or hard by; very near

play fast and loose informal to behave in an insincere or unreliable manner

interjection

archery (said by the field captain to archers) stop shooting!

Word Origin for fast

Old English fæst strong, tight; related to Old High German festi firm, Old Norse fastr

British Dictionary definitions for fast (2 of 2)

fast²

/ (fɑːst) /

verb

(intr) to abstain from eating all or certain foods or meals, esp as a religious observance

noun

an act or period of fasting
(as modifier)a fast day

Derived forms of fast

faster, noun

Word Origin for fast

Old English fæstan; related to Old High German fastēn to fast, Gothic fastan

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for fast (1 of 2)

fast 1¹

[ făst ]

adj.

Acting, moving, or being capable of acting or moving quickly.

Accomplished in relatively little time.

Exhibiting resistance to change. Used especially of stained microorganisms that cannot be decolorized.

Firmly fixed or fastened.

Medical definitions for fast (2 of 2)

fast 2²

[ făst ]

v.

To abstain from food.

To eat little or abstain from certain foods, especially as a religious discipline.

n.

The act or practice of abstaining from or eating very little food.

A period of such abstention or self-denial.

Idioms and Phrases with fast

fast

In addition to the idioms beginning with fast

fast and furious
fast and loose
fast buck
fast lane
fast track

also see:

get nowhere (fast)
hard and fast
pull a fast one
stand one's ground (fast)
thick and fast

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fast

adjective, fast·er, fast·est.

adverb, fast·er, fast·est.

noun

SYNONYMS FOR fast

ANTONYMS FOR fast

QUIZZES

LEARN THE SPANISH WORDS FOR THESE COMMON ANIMALS!

Idioms for fast

Origin of fast

synonym study for fast

Definition for fast (2 of 3)

verb (used without object)

verb (used with object)

noun

Origin of fast

OTHER WORDS FROM fast

Definition for fast (3 of 3)

noun

Origin of fast

Words related to fast

Example sentences from the Web for fast

British Dictionary definitions for fast (1 of 2)

adjective

adverb

interjection

Word Origin for fast

British Dictionary definitions for fast (2 of 2)

verb

noun

Derived forms of fast

Word Origin for fast

Medical definitions for fast (1 of 2)

adj.

Medical definitions for fast (2 of 2)

v.

n.

Idioms and Phrases with fast