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1. Dictionary

   Re·ac·tion

   /rēˈakSH(ə)n/

   

   noun

   • 1. an action performed or a feeling experienced in response to a situation or event: "Carrie's immediate reaction was one of relief" Similar responseanswerreplyrejoinderretortripostefeedbackinformal:comebackclapback
   • ▪ a person's ability to respond physically and mentally to external stimuli: "a skilled driver with quick reactions"
   • ▪ an adverse physiological response to a substance that has been breathed in, ingested, or touched: "such allergic reactions as hay fever and asthma"
   • ▪ a chemical process in which two or more substances act mutually on each other and are changed into different substances, or one substance changes into two or more other substances.
   • ▪ an analogous transformation of atomic nuclei or other particles.
   • ▪ a mode of thinking or behaving that is deliberately different from previous modes of thought and behavior: "the work of these painters was a reaction against fauvism" Similar backlashcounteractionrecoil
   • ▪ opposition to political or social progress or reform: "the institution is under threat from the forces of reaction" Similar conservatismultra-conservatismthe rightthe right wingthe extreme rightcounter-revolutionrevanchism
   • ▪ repulsion or resistance exerted in opposition to the impact or pressure of another body; a force equal and opposite to the force giving rise to it.

   Word Origin late 16th century: from re- + action, originally suggested by medieval Latin reactio(n-), from react- ‘done again’ (see react).

   Derivatives

   • 1. reactionist noun

   Scrabble Points: 10

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2. dictionary.cambridge.org › reactionREACTION | meaning - Cambridge Learner's Dictionary

   dictionary.cambridge.org › reaction

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   REACTION definition: 1. something you say, feel, or do because of something that has happened: 2. the ability to move…. Learn more.

3. www.oxfordlearnersdictionaries.com › reactionreaction noun - Definition, pictures, pronunciation and usage ...

   www.oxfordlearnersdictionaries.com › reaction

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   Definition of reaction noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

4. People also ask

   What is considered a reaction?

   • A reaction may be classified as redox in which oxidation and reduction occur or nonredox in which there is no oxidation and reduction occurring. Most simple redox reactions may be classified as combination, decomposition, or single displacement reactions.

   chemical reaction | Definition, Equations, Examples, & Types | Britannica

   www.britannica.com/science/chemical-reaction

   See all results for this question

   What does reaction mean in science?

   • What does physical reaction mean? A physical reaction occurs when molecules undergo a molecular rearrangement to produce a physical change. So, the difference is that with a physical reaction, a chemical change in the molecule is not observed, but a physical change is observed.

   What does reaction mean in the science term? - Quora

   www.quora.com/What-does-reaction-mean-in-the-science-term

   See all results for this question

   What is the meaning of reaction?

   • In psychology, reaction formation is a defense mechanism in which a person unconsciously replaces an unwanted or anxiety-provoking impulse with its opposite, often expressed in an exaggerated or showy way. A classic example is a young boy who bullies a young girl because, on a subconscious level, he's attracted to her.

   Reaction Definition in Chemistry - ThoughtCo

   www.verywellmind.com/reaction-formation-is-5190404

   See all results for this question

5. www.oxfordlearnersdictionaries.com › reactionreaction noun - Definition, pictures, pronunciation and usage ...

   www.oxfordlearnersdictionaries.com › reaction

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   Definition of reaction noun from the Oxford Advanced Learner's Dictionary. reaction. noun. OPAL W OPAL S. /riˈækʃn/ to event/situation. [countable, uncountable] what you do, say or think as a result of something that has happened. to provoke/cause/get a reaction. a positive/negative/adverse reaction.

6. www.ldoceonline.com › dictionary › reactionreaction | meaning of reaction in Longman Dictionary of ...

   www.ldoceonline.com › dictionary › reaction

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   reaction meaning, definition, what is reaction: something that you feel or do because of...: Learn more.

7. www.khanacademy.org › science › hs-chemistryChemical reactions | High school chemistry | Science | Khan ...

   www.khanacademy.org › science › hs-chemistry

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   • Overview
   • About this unit

   About this unit

   Unlock the world of chemical reactions! Get ready to decode the language of chemistry, using symbols and equations to gain a deeper understanding of how substances interact and change at the atomic level. We'll also explore the underlying energy shifts that drive these reactions, laying a solid foundation for more advanced chemical concepts.

   See full list on khanacademy.org

   Unlock the world of chemical reactions! Get ready to decode the language of chemistry, using symbols and equations to gain a deeper understanding of how substances interact and change at the atomic level. We'll also explore the underlying energy shifts that drive these reactions, laying a solid foundation for more advanced chemical concepts.

   See full list on khanacademy.org

8. Videos

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9. www.chemistrylearner.com › chemical-reactionsChemical Reactions: Types, Definitions, and Examples

   www.chemistrylearner.com › chemical-reactions

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   A chemical reaction is a process in which one or more substances are converted to one or more different substances. The starting substances are called the reactants, and the new substances that form are called the products. What Happens During a Chemical Reaction?

10. chem.libretexts.org › Courses › Oregon_Institute_of4.3: Types of Reactions - Chemistry LibreTexts

    chem.libretexts.org › Courses › Oregon_Institute_of

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    This section will help you to differentiate between the different types of reactions which we commonly see in CHE 101 and … Chemical reactions are classified according to similar patterns of behavior.