fast Definition

  • 1moving or able to move quickly
  • 2done in a short amount of time
  • 3not eating any food or very little food for a period of time, usually for religious or health reasons

Using fast: Examples

Take a moment to familiarize yourself with how "fast" can be used in various situations through the following examples!

  • Example

    The cheetah is the fastest land animal.

  • Example

    She finished the race in record time, running very fast.

  • Example

    He's a fast learner and picks up new skills quickly.

  • Example

    She's fasting for Ramadan.

  • Example

    I need to take a fast shower before we leave.

fast Synonyms and Antonyms

Synonyms for fast

Antonyms for fast

Idioms Using fast

  • to remain firmly committed to something


    Despite the challenges, she held fast to her beliefs and values.

  • play fast and loose

    to behave recklessly or irresponsibly


    He's been playing fast and loose with his finances, spending more than he earns.

  • to deceive or trick someone


    I thought I was getting a good deal, but it turns out he pulled a fast one on me.

Phrases with fast

  • in a deep sleep


    The baby was fast asleep in her crib.

  • very quick and intense


    The storm hit fast and furious, causing widespread damage.

  • food that is prepared and served quickly, often in a restaurant chain


    We grabbed some fast food on the way home from the movie theater.

Origins of fast

from Old English 'fæst', meaning 'firmly fixed'


Summary: fast in Brief

The term 'fast' [fæst] can be used as an adjective or adverb to describe quickness in movement or time, as in 'The cheetah is the fastest land animal.' It can also refer to abstaining from food for religious or health reasons, as in 'She's fasting for Ramadan.' Phrases like 'fast asleep' and idioms like 'hold fast' extend the meaning to deep sleep and firm commitment, respectively. 'Fast' can also be used to describe food that is prepared and served quickly, as in 'We grabbed some fast food on the way home.'

How do native speakers use this expression?