A1adjective1K

Fast

UK /["/fɑːst/"]/US /["/fæst/"]/

Definition

moving or able to move quickly

In simple words: Moving or happening quickly.

Examples

  • She runs very fast when she is late for school.
  • The car is too fast for beginners to drive safely.
  • You need to fasten your seatbelt while driving fast.
  • He is a fast learner and understands new concepts quickly.
  • The pizza delivery was fast, arriving within 20 minutes.

Usage notes

Use 'fast' to describe speed, but be cautious when using it with 'to' (as in 'to fast', it means to not eat for a period of time). Appropriate in both written and spoken contexts.

Grammar pattern

standalone adjective

Memory hint

Think of a fast car racing on a track — speedy and thrilling!

Collocations

  • be
  • seem
  • extremely
  • fairly
  • very
  • be
  • seem
  • extremely
  • fairly
  • very

Synonyms

  • quick
  • rapid
  • swift
  • speedy
  • hasty

Antonyms

  • slow

Common mistakes

  • 'Fast' is sometimes confused with 'quick' improperly.
  • Learners often forget that 'fast' can be used for both time and physical speed.
  • Some may incorrectly add 'ly' to make it an adverb (fastly).