fast
fɑːst
Definition Synonyms Conjugation

Definition of fast - Reverso English Dictionary

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Adjective

1.
speedmoving or capable of moving quickly
  • The fast car zoomed past us.
quick rapid swift
2.
steadfastRareloyal and unwavering in supportRare
  • She is a fast friend who always helps.
faithful loyal steadfast

Adverb

1.
speedquickly with great speed
  • She ran fast to catch the bus.
quickly swiftly
2.
sleepdeeply or soundly
  • He was sleeping fast when the alarm rang.
deeply soundly

Verb

intr.
1.
dietabstain from all or some kinds of food or drink
  • He decided to fast for two days to cleanse his body.
abstain refrain
2.
religionabstain from eating for religious reasons
  • During Ramadan, Muslims fast from sunrise to sunset.
abstain refrain

Noun

1.
religionperiod of abstaining from all or some kinds of food or drink
  • During the fast, participants refrain from eating until sunset.
abstinence fasting
2.
rail transportUKtrain service with limited stopsUK
  • The fast to London only stops at major stations.
express limited
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Images of fast

  • fast: train service with limited stops
    train service with limited stops

Expressions with fast

💡 Discover popular phrases, idioms, collocations, or phrasal verbs. Click any expression to learn more, listen to its pronunciation, or save it to your favorites.
quickly process information or make a decision
In emergencies, you must think fast to stay safe.
lane on a road for fast vehicles
He switched to the fast lane to overtake.
someone who acts quickly and decisively
In emergencies, a fast mover can make a big difference.
happening in an instant
Her lightning fast reflexes saved the day.
information spreads quickly
In small towns, news travels fast.
used to tell someone to stop or slow down
Not so fast, we need to check everything first.

Origin of fast

Old English, fæst (firm)

Terms with fast included in their meaning

💡 A powerful way to uncover related words, idioms, and expressions linked by the same idea — and explore meaning beyond exact word matches.
speed
in a fast manner or speedily
slowadv.
not fast
moving with little speed or urgency
fast food
ground beef patty in a bun, often seasoned, sometimes toasted
decelerate
become less fast or active
move fast
run or move quickly and suddenly
transportation
fast train with few stops
quickintj.
hurry
urging someone to act fast
move fast
cause someone or something to move quickly

Examples of fast in a sentence

  • The fast train arrived ahead of schedule.
  • His fast loyalty never wavered during tough times.
  • They remained fast allies throughout the conflict.
  • My watch runs fast when the battery is low.
  • Set the kitchen timer back; it is fast.
  • Choose fast fabric for the outdoor cushions.

View all translations of fast

✨Click below to see the appropriate translations facing each meaning.
  1. French:rapide, rapidement, ...
  2. German:schnell, flott, ...
  3. Italian:veloce, velocemente, ...
  4. Spanish:rápido, rápidamente, ...
  5. Portuguese:rápido, rapidamente, ...
  6. Chinese:快速的, 飞快地, ...
  7. Japanese:速い, 速く, ...
  8. Arabic:سَرِيع, بِسُرْعَة, ...
  9. Hebrew:מָהִיר, מַהֵר, ...
  10. Russian:быстрый, быстро, ...
  11. Ukrainian:швидкий, швидко, ...
  12. Hindi:तेज़, तेज़ी से, ...
FAST
fæst

Definition of FAST - Reverso English Dictionary

Abbreviation

1.
abr: facial drooping, arm weakness, speech difficulty, timeTECH.UKtest to spot stroke signs quickly using symptomsTECH.UK
  • Remember FAST if you think someone has a stroke.
2.
abr: Five-hundred-meter Aperture Spherical radio TelescopeTECH.large radio telescope for space observationTECH.
  • FAST discovered a new pulsar last year.

Acronym

acr: Face, Arms, Speech, TimeTECH.reminds signs of a stroke to watch forTECH.
  • Remember FAST if you see stroke symptoms.
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Origin of FAST

Acronym FAST (Face, Arm, Speech, Time)

Examples of FAST in a sentence

  • FAST can help save lives during emergencies.
  • FAST will help map distant galaxies.
  • China built FAST for astronomical research.
  • The nurse taught us to use FAST for emergencies.
  • FAST can help save lives during a stroke.

View all translations of FAST

✨Click below to see the appropriate translations facing each meaning.
  1. French:VITE, acronyme de sensibilisation aux AVC, ...
  2. German:FAST, ...
  3. Italian:FAST, acronimo per riconoscere i segni dell'ictus, ...
  4. Spanish:FAST, ...
  5. Portuguese:FAST, RÁPIDO, ...
  6. Chinese:FAST中风识别法, FAST中风急救口诀, ...
  7. Japanese:FAST, 500メートル球面電波望遠鏡, ...
  8. Arabic:اختبار علامات السكتة الدماغية السريع, عَلامَات السَّكْتَة الدِّمَاغِيَّة, ...
  9. Hebrew:FAST, פַּאסְט, ...
  10. Russian:тест для быстрой проверки признаков инсульта, мнемоника для распознавания признаков инсульта, ...
  11. Ukrainian:FAST, ознаки інсульту: обличчя, руки, мова, час, ...
  12. Hindi:फास्ट, चेहरा, हाथ, भाषण, समय, ...

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