easy
His reaction to the surprise was a big smile.
What does Reaction mean?
A reaction is a response.
Dictionary definition
A response to something that happens, changes, or is said.
Example sentences
Reaction in a sentence
medium
The vinegar caused a bubbling reaction in the experiment.
hard
The character's reaction revealed how much the news mattered.
Writing practice
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Quick practice
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Practice the meaning of Reaction
Answer three quick questions about its meaning and related words.
Question 1 of 3
Practice 1
What does reaction mean?
The correct answer matches the meaning of reaction.
Practice 2
Which word is closest in meaning to reaction?
Response is close to reaction in this main meaning.
Practice 3
Choose the best word to complete the sentence: His ____ to the surprise was a big smile.
Reaction best completes the sentence.
Practice complete
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You completed 3 questions.
Pronunciation coach
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Reaction
Voice settings
Sounds like
ree · ak · shun · strongest beat: ak
Tap each sound part, then blend the whole word together.
Learn
WordReaction.
Partnoun.
MeaningReaction means A reaction is a response.
ExampleExample: His reaction to the surprise was a big smile.
Word breakdown
3 syllables. Say each part, then blend the word.
- Syllables
- ree · ak · shun
- Strongest beat
- ak
- Ending
- shun
- Tip
- Put a little extra energy on ak.
Your turn
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Nice work—you practiced reaction.
Synonyms
Words like Reaction
Antonyms
Opposite words
no responseUse as a meaningful contrast in this word's main sense.
inactionUse as a meaningful contrast in this word's main sense.
Synonym practice
Want to practice reaction synonyms in context? Try a Synonym Search question like "The puppy's reaction to the bell was a quick bark," then compare close word choices. Practice reaction synonyms.
Word family
Reaction word family
Base word
reaction
noun
reactions
More than one reaction.
Related words
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Learning activities
Practice Reaction and explore more word games
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