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| re·act [ ree ákt ] (past and past participle re·act·ed, present participle re·act·ing, 3rd person present singular re·acts) |
intransitive verb |
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| Definition: |
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1. respond emotionally: to respond to something by showing the feelings or thoughts it arouses
  Officials reacted with guarded optimism.
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2. respond by taking action: to respond to something by taking action
The government reacted by sending in troops.
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3. be in opposition: to act in opposition to somebody or something
children reacting against their parents
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4. undergo physical response: to respond to the physical effects of something such as a medication or air pollution
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5. chemistry change chemically: to undergo a chemical reaction
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