Fast definition
Fast is an adjective meaning "acting or moving or capable of acting or moving quickly." It has 15 meanings, as an adjective, an adverb, a verb and a noun, listed below with example sentences.
- Part of speech
- adjective, adverb, verb, noun
- Syllables
- 1
- Letters
- 4
- How common
- Everyday word
Fast as an adjective
acting or moving or capable of acting or moving quickly
"fast film"
(used of timepieces) indicating a time ahead of or later than the correct time
"my watch is fast"
at a rapid tempo
"the band played a fast fox trot"
(of surfaces) conducive to rapid speeds
"a fast road"
resistant to destruction or fading
"fast colors"
unrestrained by convention or morality
"fast women"
Same sense: degenerate, degraded, dissipated, riotous, libertine, profligate, dissolute, debauched
hurried and brief
"a fast visit"
Same sense: quick, flying
securely fixed in place
Same sense: firm, immobile
unwavering in devotion to friend or vow or cause
"fast friends"
Same sense: firm, loyal, truehearted
(of a photographic lens or emulsion) causing a shortening of exposure time
"a fast lens"
Fast as an adverb
quickly or rapidly (often used as a combining form)
"how fast can he get here?"
firmly or closely
"held fast to the rope"
Same sense: tight
Fast as a verb
abstain from certain foods, as for religious or medical reasons
"Catholics sometimes fast during Lent"
abstain from eating
"Before the medical exam, you must fast"
Fast as a noun
abstaining from food
Same sense: fasting
Synonyms and antonyms
- degenerate
- degraded
- dissipated
- riotous
- libertine
- profligate
- dissolute
- debauched
- quick
- flying
- firm
- immobile
- loyal
- truehearted
- tight
- fasting
Opposite: slow.
How to say fast
Fast has 1 syllable and rhymes with last. Syllable counts and rhymes come from the CMU Pronouncing Dictionary.
Words that rhyme with fast
FAST in word games
- Scrabble
- 7
- Words With Friends
- 7
- Anagrams
- 1
Is FAST a valid Scrabble word? Yes, it is in the ENABLE list most word games use. Check FAST in the word checker, or unscramble FAST to see its 1 anagram and the shorter words in its letters.
Definitions and examples from Open English WordNet (CC BY 4.0). Browse more words in the dictionary.