part of speech: adjective
inflections: faster, fastest
definition 1: moving or operating with speed.
- He’s a fast runner.
- She drives a fast car.
synonyms: quick, rapid
antonyms: slack, slow
definition 2: done in a short time.
- She prepared a fast meal.
synonyms: quick
antonyms: slow
definition 3: true and loyal.
- Meg and I are fast friends.
synonyms: devoted, faithful, firm, steadfast, steady, true
definition 4: fixed or firmly attached.
- I tried to shake him off, but he had a fast grip on my arm.
synonyms: fixed, secure, stable, stationary, tight
antonyms: loose
definition 5: ahead of the correct time.
- That clock is five minutes fast.
definition 6: not easily faded; fixed firmly.
- The blue in this shirt won’t wash out because the color is fast.
antonyms: temporary
part of speech: adverb
inflections: faster, fastest
definition 1: with speed; quickly.
- He came fast when his mother called him for dinner.
synonyms: at full tilt, quickly, rapidly
antonyms: slowly
definition 2: tightly; firmly.
- She held fast to her child’s hand.
synonyms: firmly, securely, tightly
antonyms: loosely
definition 3: deeply; soundly.
- We fell fast asleep.
synonyms: soundly
