Simple meaning
What does Fast mean?
Fast means quick or able to move in a short time.
Dictionary definition
Moving, happening, or working quickly.
Example sentences
Fast in a sentence
easy
The fast rabbit hopped across the grass.
medium
We took a fast train into the city.
hard
A fast response helped the team fix the problem.
Synonyms
Words like Fast
quickUse for something that happens in a short time.
speedyUse for something that moves with speed.
Antonyms
Opposite words
slowUse for something that takes a long time.
sluggishUse for something moving slowly or weakly.
Word family
Fast word family
Base word
fast
adjective
faster
More fast.
adjective
fastest
Most fast.
noun
fastness
The quality of being fast.
Related words
Explore related words
Quick practice
Try Fast
Practice 1
Which word is closest in meaning to fast?
Fast and quick both describe something that moves or happens in a short time.
Practice this skill
Practice vocabulary in WordHive
Use the dictionary to understand Fast, then move into short activities matched to the skills on this page.
Learning paths
- Synonym Search for word choice.
- Context Clue Challenge for sentence clues.
- Buzz Between for homophones and listening.
- Hive Builder for roots, prefixes, and suffixes.
- Define the Word Hive for word meanings.