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Merriam-Webster Online Dictionary
fast (adjective)
1.
a) firmly fixed - roots fast in the ground
b) tightly shut - the drawers were fast
c) adhering firmly
d) not easily freed - stuck a ball fast in the mouth of the cannon
e) - stable movable items were made fast to the deck
2.
firmly loyal - became fast friends
3.
a) characterized by quick motion, operation, or effect
(1) moving or able to move rapidly - swift
(2) taking a comparatively short time
(3) imparting quickness of motion - a fast bowler
(4) accomplished quickly
(5) agile of mind , especially quick to learn - a class for fast students
b) conducive to rapidity of play or action
c) (1) of a timepiece or weighing device indicating in advance of what is correct
(2) according to or being daylight saving time
d) contributing to a shortening of exposure time - fast film
e) acquired with unusually little effort and often by shady or dishonest methods - had a keen eye for a fast buck R. A. Keith
4.
a) securely attached - a rope fast to the wharf
b) - tenacious a fast hold on her purse
5.
a) archaic sound asleep
b) of sleep not easily disturbed
6.
not fading or changing color readily
7.
a) - wild a pretty fast crowd
b) sexually promiscuous
8.
resistant to change (as from destructive action or fading) - fast dyes often used in combination sunfast acid-fast bacteria
fast (adverb)
1.
in a firm or fixed manner - stuck fast
2.
in a sound manner - deeply fast asleep
3.
a) in a rapid manner - quickly
b) in quick succession
4.
in a reckless or dissipated manner
5.
ahead of a correct time or schedule
6.
archaic - close near
fast (verb)
intransitive verb
1.
to abstain from food
2.
to eat sparingly or abstain from some foods
fast (noun)
1.
the practice of - fasting
2.
a time of fasting
fast (noun)
something that (as a mooring line) or holds a - fastens fastening
Merriam-Webster Online Thesaurus
fast (adjective)
1.
moving, proceeding, or acting with great speed
SYNONIMS:
blistering, breakneck, breathless, brisk, dizzy, fleet, fleet-footed, flying, galloping, hasty, hot, lightning, nippy, quick, rapid, rapid-fire, rattling, snappy, speedy, splitting, swift, whirlwind, zippy
RELATED WORDS:
expeditious, prompt, ready; accelerated, hastened, hurried, quickened, rushed; breathtaking; energetic, strenuous, strong, vigorous; high-speed; rush; ultrafast, ultrarapid
at speed []
NEAR ANTONYMS:
crawling, dallying, dawdling, dillydallying, dragging, laggard, languid, lingering, plodding, poking, poky ( pokey), slowish, sluggish, unhurried; deliberate, leisurely, measured; dilatory, late, tardy; ultraslow
slow
fast (adjective)
2.
firm in one's allegiance to someone or something
SYNONIMS:
constant, dedicated, devoted, devout, down-the-line, fast, good, loyal, pious, staunch ( stanch), steadfast, steady, true, true-blue
RELATED WORDS:
dependable, dutiful, reliable, responsible, solid, tried, tried-and-true, trustworthy, trusty; unfaltering, unhesitating, unwavering; determined, intent, resolute; confirmed, dyed-in-the-wool, inveterate, sworn; ardent, avid, enthusiastic, fervent, fervid, gung ho, impassioned, passionate, serious
NEAR ANTONYMS:
irresponsible, undependable, unreliable, untrustworthy; faltering, hesitant, vacillating, wavering; dubious, irresolute, shaky, uncertain; apathetic, dispassionate, uninterested
disloyal, faithless, false, fickle, inconstant, perfidious, recreant, traitorous, treacherous, unfaithful, untrue
fast (adjective)
3.
firmly positioned in place and difficult to dislodge
SYNONIMS:
fast, firm, frozen, jammed, lodged, set, snug, stuck, wedged
RELATED WORDS:
bonded, cemented, glued; anchored, clamped; embedded ( imbedded), entrenched ( intrenched), impacted, implanted; attached, bound, fastened, secured; immovable, unyielding
NEAR ANTONYMS:
detached, dislodged, freed, loosened, unattached, unbound, undone, unfastened, unsecured; movable ( moveable), yielding
insecure, loose
fast (adjective)
4.
given to or marked by cheating and deception
SYNONIMS:
bent, crooked, deceptive, double-dealing, duplicitous, fast, fraudulent, guileful, rogue, shady, sharp, shifty, underhand, underhanded
RELATED WORDS:
unconscionable, unethical, unprincipled, unscrupulous; deceitful, deceiving, deluding, delusive, delusory, false; artful, beguiling, cagey ( cagy), crafty, cunning, foxy, slick, sly, subtle, wily; defrauding, devious, furtive, slippery, sneaking, sneaky, trickish, tricky; insidious, perfidious, treacherous
NEAR ANTONYMS:
conscientious, decent, ethical, honorable, just, scrupulous, upright; forthright, straightforward
aboveboard, honest, straight
fast (adjective)
5.
marked by the ability to withstand stress without structural damage or distortion
SYNONIMS:
bombproof, fast, firm, sound, stalwart, strong, sturdy
RELATED WORDS:
dependable, durable, reliable; infrangible, irrefragable, unbreakable; beefy, solid; cohesive, tough
NEAR ANTONYMS:
infirm, insecure, weak; shaky, tottering, tottery, unbalanced, wobbly ( wabbly); unsubstantial
rickety, unsound, unstable, unsteady
fast (adjective)
6.
not lasting for a considerable time
SYNONIMS:
brief, fast, little
RELATED WORDS:
shortish; abbreviated, abridged, curtailed, cut-back, shortened, syncopated; compact, condensed; abrupt, sudden; ephemeral, fleeting, momentary, short-lived, transient, transitory; impermanent; compendious, concise, crisp, epigrammatic, laconic, pithy, succinct, summary, terse; short-range, short-term
NEAR ANTONYMS:
endless, everlasting, interminable, persistent, unending; longish, overlong, prolonged, protracted; permanent; enlarged, expanded, supplemented; long-range, long-term
extended, far, great, lengthy, long, long-drawn-out ( long-drawn), long-lived
fast (adjective)
7.
having or showing quickness of mind
SYNONIMS:
alert, brainy, bright, brilliant, clever, exceptional, fast, hyperintelligent, keen, nimble, quick, quick-witted, sharp, sharp-witted, smart, supersmart, ultrasmart
RELATED WORDS:
apt, ingenious, resourceful; acute, astute, discerning, heady, insightful, knowing, perceptive, percipient, perspicacious, sagacious, sapient, savvy, wise; cerebral, erudite, genial, highbrow, knowledgeable, learned, literate, scholarly, well-read; educated, informed, schooled, skilled, trained; creative, inventive, judicious, prudent, sage, sane, sapient, sensible, sound, wise; crafty, cunning, foxy, shrewd, wily; logical, rational, reasonable
NEAR ANTONYMS:
feebleminded, simpleminded; boobish, foolish, half-baked, idiotic ( idiotical), imbecile ( imbecilic), moronic, silly; ignorant, illiterate, lowbrow, nonintellectual, unacademic, uneducated, uninformed, unintellectual, untaught, unthinking; absurd, asinine, balmy, cockeyed, crackpot, crazy, cuckoo, daffy, daft, dippy, dotty, featherheaded, fool, half-baked, harebrained, insane, kooky ( kookie), loony ( looney), lunatic, mad, nonsensical, nutty, preposterous, sappy, screwball, tomfool, unwise, wacky ( whacky), zany
airheaded, birdbrained, boneheaded, brain-dead, brainless, bubbleheaded, chuckleheaded, dense, dim, dim-witted, doltish, dopey ( dopy), dorky [], dull, dumb, dunderheaded, empty-headed, fatuous, gormless [], half-witted, knuckleheaded, lamebrain ( lamebrained), lunkheaded, mindless, obtuse, opaque, pinheaded, senseless, simple, slow, slow-witted, soft, softheaded, stupid, thick, thickheaded, thick-witted, unbrilliant, unintelligent, unsmart, vacuous, weak-minded, witless
fast (adverb)
1.
with great speed
SYNONIMS:
apace, briskly, chop-chop, double-quick, fleetly, full tilt, hastily, hell-for-leather, hot, lickety-split, posthaste, presto, pronto, quick, quickly, rapidly, snappily, soon, speedily, swift, swiftly
RELATED WORDS:
immediately, promptly, readily; impetuously, impulsively, rashly, recklessly; abruptly, suddenly; energetically, vigorously
a mile a minute, at full throttle, at full tilt, by leaps and bounds, in a hurry, in short order, like a shot, like gangbusters, like wildfire
NEAR ANTONYMS:
laggardly, lingeringly, ploddingly, sluggishly; deliberately, leisurely; belatedly, delinquently, tardily
slow, slowly
fast (adverb)
2.
to a full extent or degree
SYNONIMS:
all, all of, all over, altogether, clean, completely, dead, enough, entire, entirely, even, exactly, fast, flat, full, heartily, out, perfectly, plumb, quite, soundly, thoroughly, through and through, totally, utterly, well, wholly, wide
RELATED WORDS:
absolutely, categorically, cold, downright, hands down, plain, stone, stone-cold, unqualifiedly; basically, by and large, chiefly, generally, largely, mainly, more or less, mostly, overall, predominantly, predominately, primarily, principally, substantially; abundantly, copiously, generously, greatly
NEAR ANTONYMS:
barely, hardly, just, kind of, marginally, minimally, scarcely, slightly, superficially; approximately, roughly, somewhat
half, halfway, incompletely, part, partially, partly
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