Synonyms of fast in English:

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fast 1


  • 1 a fast sports car the game is played at a fast pace
    brisk, nimble, sprightly, lively;
    fast-moving, high-speed, turbo, sporty, accelerated, express, flying;
    whirlwind, blistering, breakneck, pell-mell, meteoric, smart;
    informalnippy, zippy, spanking, scorching, blinding, supersonic
    British informalcracking
    [Antonyms] slow
  • 2 his hand slammed against the door, holding it fast
    secure, secured, fastened, tight, firmly fixed;
    stuck, jammed, immovable, unbudgeable, stiff;
    [Antonyms] loose
  • 3 the dyes are boiled with yarn to produce a fast colour
    indelible, lasting, permanent, stable
    [Antonyms] temporary
  • 4 they remained fast friends
    constant, lasting, unchanging, unwavering, enduring, unswerving
  • 5 a fast woman
    North American informalroundheeled
    West Indian informalslack
    [Antonyms] chaste
  • 6 the fast life she led in London
    wild, dissipated, dissolute, debauched, intemperate, immoderate, louche, rakish, decadent, unrestrained, reckless, profligate, self-indulgent, shameless, sinful, immoral, extravagant
    [Antonyms] sedate
  • Phrases

    fast and furious

    the fun was fast and furious
    frantic, wild, frenetic, hectic, fraught, feverish, fevered, mad, crazed, manic, hyperactive, energetic, intense, turbulent, tumultuous

    make fast

    the craft is made fast to the shore


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  • 1 she drove fast towards the gates
    quickly, rapidly, swiftly, speedily, briskly, at speed, at full speed, at full tilt;
    hastily, with all haste, in haste, hurriedly, in a hurry, post-haste, pell-mell;
    without delay, expeditiously, with dispatch, like a shot, like a flash, in a flash, in the blink of an eye, in a wink, in a trice, in no time (at all), on the double, at the speed of light, like an arrow from a bow
    North American informallickety-split
    [Antonyms] slowly
  • 2 his wheels were stuck fast
  • 3 Richard's fast asleep
    deeply, sound, completely
  • 4 she lived fast and dangerously
  • Word links

    tachy- related prefix, as in tachycardia, tachygraphy

    Definition of fast in:

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    Synonyms of fast in English:

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    fast 2


  • the ministry instructed people to fast, pray, and read scripture
    abstain from food, refrain from eating, deny oneself food, go without food, go hungry, eat nothing, starve oneself;
    go on hunger strike
    [Antonyms] eat, indulge oneself
  • noun

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  • a five-day fast
    period of fasting, period of abstinence;
    [Antonyms] feast
  • Definition of fast in:

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