fast

When you see fast, you might think of Olympic runner Usain "Lightning" Bolt or a Porsche 911 Turbo. Alternatively, and quite confusingly, fast also means to refrain from eating for a certain period, usually for religious reasons.

Fast is another of those deceptively simple words that have a number of other meanings beyond their most common usages. If something "sticks fast" it means it cannot be removed — like a leech or a stain. "To stand fast" means not to give up your point of view or to remain loyal. Then there's also the slang meaning of living beyond the constraints of normal behavior — as in "the fast life," "the fast track," or "the fast lane."

Definitions of fast
  1. adjective
    acting or moving or capable of acting or moving quickly
    fast film”
    “on the fast track in school”
    “set a fast pace”
    “a fast car”
    Synonyms:
    accelerated
    speeded up, as of an academic course
    alacritous
    quick and eager
    blistering, hot, red-hot
    very fast; capable of quick response and great speed
    double-quick
    (of a marching cadence) very quick
    express
    without unnecessary stops
    fast-breaking
    occurring rapidly as a series of events in rapid succession
    fast-paced
    of communication that proceeds rapidly
    fleet, swift
    moving very fast
    high-speed, high-velocity
    operating at high speed
    hurrying, scurrying
    moving with great haste
    immediate, prompt, quick, straightaway
    performed with little or no delay
    instant, instantaneous
    occurring with no delay
    meteoric
    like a meteor in speed or brilliance or transience
    quick, speedy
    accomplished rapidly and without delay
    rapid
    done or occurring in a brief period of time
    rapid, speedy
    characterized by speed; moving with or capable of moving with high speed
    smart
    quick and brisk
    winged
    very fast; as if with wings
    windy
    resembling the wind in speed, force, or variability
    sudden
    happening without warning or in a short space of time
    hurried
    moving rapidly or performed quickly or in great haste
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    Antonyms:
    slow
    not moving quickly; taking a comparatively long time
    bumper-to-bumper
    used of traffic
    dilatory, laggard, pokey, poky
    wasting time
    drawn-out
    (used of speech) uttered slowly with prolonged vowels
    lazy
    moving slowly and gently
    long-play, long-playing
    (used of records) playing at a slower speed and for a longer time than earlier records
    slow-moving
    moving slowly
    sluggish, sulky
    moving slowly
    gradual
    proceeding in small stages
    unhurried
    relaxed and leisurely; without hurry or haste
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  2. adjective
    at a rapid tempo
    “the band played a fast fox trot”
    Synonyms:
    allegro
    (of tempo) fast
    allegretto
    (of tempo) faster than allegro
    andantino
    (of tempo) moderately fast
    presto
    (of tempo) very fast
    prestissimo
    (of tempo) as fast as possible
    vivace
    (of tempo) very fast and lively
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    Antonyms:
    slow
    at a slow tempo
    adagio
    (of tempo) leisurely
    andante
    (of tempo) moderately slow
    lento
    (of tempo) slow
    lentissimo
    (of tempo) very slow
    largo
    very slow in tempo and broad in manner
    larghetto
    (of tempo) less slow and broad than largo
    larghissimo
    (of tempo) as slow and broad as possible
    moderato
    (of tempo) moderate
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  3. adjective
    hurried and brief
    “a fast visit”
    synonyms: flying, quick
    hurried
    moving rapidly or performed quickly or in great haste
  4. adjective
    (of a photographic lens or emulsion) causing a shortening of exposure time
    “a fast lens”
    Synonyms:
    causative
    producing an effect
  5. adverb
    quickly or rapidly (often used as a combining form)
    “how fast can he get here?”
    “ran as fast as he could”
    “needs medical help fast
    fast-running rivers”
    fast-breaking news”
    fast-opening (or fast-closing) shutters”
  6. adjective
    securely fixed in place
    synonyms: firm, immobile
    fixed
    securely placed or fastened or set
  7. adjective
    resistant to destruction or fading
    fast colors”
    Synonyms:
    imperviable, impervious
    not admitting of passage or capable of being affected
  8. adjective
    unwavering in devotion to a friend or vow or cause
    fast friends”
    synonyms: firm, loyal, truehearted
    faithful
    steadfast in affection or allegiance
  9. adverb
    firmly or closely
    “held fast to the rope”
    “her foot was stuck fast
    synonyms: tight
  10. adjective
    (used of timepieces) indicating a time ahead of or later than the correct time
    “my watch is fast
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    Antonyms:
    slow
    (used of timepieces) indicating a time earlier than the correct time
  11. adjective
    (of surfaces) conducive to rapid speeds
    “a fast road”
    Synonyms:
    smooth
    having a surface free from roughness or bumps or ridges or irregularities
  12. adjective
    unrestrained by convention or morality
    fast women”
    synonyms: debauched, degenerate, degraded, dissipated, dissolute, libertine, profligate, riotous
    immoral
    deliberately violating accepted principles of right and wrong
  13. verb
    abstain from eating
    “Before the medical exam, you must fast
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    types:
    diet
    eat sparingly, for health reasons or to lose weight
    type of:
    abstain, desist, refrain
    choose not to partake in or consume
  14. verb
    abstain from certain foods, as for religious or medical reasons
    “Catholics sometimes fast during Lent”
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    types:
    diet
    follow a regimen or a diet, as for health reasons
    type of:
    abstain, desist, refrain
    choose not to partake in or consume
  15. noun
    abstaining from food
    synonyms: fasting
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    types:
    diet, dieting
    the act of restricting your food intake (or your intake of particular foods)
    hunger strike
    a voluntary fast undertaken as a means of protest
    Ramadan
    (Islam) a fast (held from sunrise to sunset) that is carried out during the Islamic month of Ramadan
    type of:
    abstinence
    act or practice of refraining from indulging an appetite
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