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
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
intransitive verb
1.
to abstain from food
2.
to eat sparingly or abstain from some foods
1.
the practice of - fasting
2.
a time of fasting
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, zippyRELATED WORDS:
expeditious, prompt, ready; accelerated, hastened, hurried, quickened, rushed; breathtaking; energetic, strenuous, strong, vigorous; high-speed; rush; ultrafast, ultrarapidNEAR ANTONYMS:
crawling, dallying, dawdling, dillydallying, dragging, laggard, languid, lingering, plodding, poking, poky ( pokey), slowish, sluggish, unhurried; deliberate, leisurely, measured; dilatory, late, tardy; ultraslow2.
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-blueRELATED 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, seriousNEAR ANTONYMS:
irresponsible, undependable, unreliable, untrustworthy; faltering, hesitant, vacillating, wavering; dubious, irresolute, shaky, uncertain; apathetic, dispassionate, uninterested3.
firmly positioned in place and difficult to dislodge
SYNONIMS:
fast, firm, frozen, jammed, lodged, set, snug, stuck, wedgedRELATED WORDS:
bonded, cemented, glued; anchored, clamped; embedded ( imbedded), entrenched ( intrenched), impacted, implanted; attached, bound, fastened, secured; immovable, unyieldingNEAR ANTONYMS:
detached, dislodged, freed, loosened, unattached, unbound, undone, unfastened, unsecured; movable ( moveable), yielding4.
given to or marked by cheating and deception
SYNONIMS:
bent, crooked, deceptive, double-dealing, duplicitous, fast, fraudulent, guileful, rogue, shady, sharp, shifty, underhand, underhandedRELATED 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, treacherousNEAR ANTONYMS:
conscientious, decent, ethical, honorable, just, scrupulous, upright; forthright, straightforward5.
marked by the ability to withstand stress without structural damage or distortion
SYNONIMS:
bombproof, fast, firm, sound, stalwart, strong, sturdyRELATED WORDS:
dependable, durable, reliable; infrangible, irrefragable, unbreakable; beefy, solid; cohesive, toughNEAR ANTONYMS:
infirm, insecure, weak; shaky, tottering, tottery, unbalanced, wobbly ( wabbly); unsubstantial6.
not lasting for a considerable time
SYNONIMS:
brief, fast, littleRELATED 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-termNEAR ANTONYMS:
endless, everlasting, interminable, persistent, unending; longish, overlong, prolonged, protracted; permanent; enlarged, expanded, supplemented; long-range, long-term7.
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, ultrasmartRELATED 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, reasonableNEAR 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), zany1.
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, swiftlyRELATED WORDS:
immediately, promptly, readily; impetuously, impulsively, rashly, recklessly; abruptly, suddenly; energetically, vigorouslyNEAR ANTONYMS:
laggardly, lingeringly, ploddingly, sluggishly; deliberately, leisurely; belatedly, delinquently, tardily2.
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, wideRELATED 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, greatlyNEAR ANTONYMS:
barely, hardly, just, kind of, marginally, minimally, scarcely, slightly, superficially; approximately, roughly, somewhat