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- pronunciation:
- ri
aek
sh
 n
- features:
- Word Combinations (noun), Word Explorer, Word Parts
| part of speech: |
noun |
| definition 1: |
a movement, action, or response in reverse direction or manner.
- synonyms:
- counteraction, reversal, withdrawal
- similar words:
- reverse, rise
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| definition 2: |
movement toward extreme political conservatism.
The 1980s was a decade of reaction.- synonyms:
- ultraconservatism
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| definition 3: |
a response to an influence or stimulus.
I was surprised by his calm reaction to the news of her suicide.We all want to see her reaction when they announce the winner.- synonyms:
- response
- similar words:
- reply, rise
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| definition 4: |
in chemistry, change that occurs as substances are combined.
The substance turns blue because of a chemical reaction. |
| definition 5: |
in physics, the atomic change that occurs when a nucleus is bombarded with a particle, photon, or other nucleus.
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| definition 6: |
in mechanics, the immediate response to the application of a force, resulting in an equal and opposite force.
- synonyms:
- counteraction
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| related words: |
answer, attitude, behavior, effect, emotion, expression, idea, kick, kickback, mechanism |
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| derivations: |
reactional (adj.), reactionally (adv.) |
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