reaction

/ri:'ækʃn/

Thân thiện

The scientist observes the chemical reaction in the test tube.

Definition

1. Noun:
   • A response to a stimulus or event: A reaction is something done, felt, or thought in response to a situation, action, or statement.
   • A chemical or physical change: In science, a reaction is a process where substances interact to form new substances or release energy.
   • A political or social tendency: Reaction can refer to a movement or attitude opposing progress or liberal change.
   • A force in physics: In mechanics, a reaction is the equal and opposite force that occurs when one object exerts a force on another.

Examples of Usage

• General Response:
  • Her immediate reaction was to laugh.
  • We are waiting for the public's reaction to the new policy.
• Scientific Process:
  • The chemical reaction produced a lot of heat.
  • An allergic reaction can cause a skin rash.
• Opposing Force or Movement:
  • The political party represented a reaction against globalization.
  • Newton's third law states that for every action there is an equal and opposite reaction.

Advanced Usage

• "Gut reaction": An immediate, instinctive response.
  • My gut reaction was to say no, but I thought about it more.
• "Chain reaction": A series of events where each causes the next.
  • The bank's failure set off a chain reaction in the financial markets.

Variants and Related Words

• React (verb): To act or behave in response to something.
  • How did he react to the news?
• Reactionary (adjective/noun): Opposing political or social progress.
  • His views are considered reactionary.
• Reactive (adjective): Showing a response; tending to react rather than act first.
  • The government took a reactive approach to the crisis.

Synonyms

• Response: An answer or reply.
• Feedback: Information about a result returned as input for modification.
• Backlash: A strong negative reaction by a large number of people.

Related Phrases (Phrasal Verbs)

• React against: To oppose or show dislike for something by acting differently.
  • The artist reacted against the traditional styles of his time.
• React to: To behave in a particular way because of something that has happened.
  • How will the markets react to the announcement?

Related Idioms

• Knee-jerk reaction: An automatic and unthinking response.
  • His apology seemed like a knee-jerk reaction to the criticism.

Học thuật

Noun

1. doing something in opposition to another way of doing it that you don't like
   • his style of painting was a reaction against cubism
2. extreme conservatism in political or social matters
   • the forces of reaction carried the election
3. a response that reveals a person's feelings or attitude
   • he was pleased by the audience's reaction to his performance
   • John feared his mother's reaction when she saw the broken lamp
4. (mechanics) the equal and opposite force that is produced when any force is applied to a body
   • every action has an equal and opposite reaction
5. a bodily process occurring due to the effect of some antecedent stimulus or agent
   • a bad reaction to the medicine
   • his responses have slowed with age
6. an idea evoked by some experience
   • his reaction to the news was to start planning what to do
7. (chemistry) a process in which one or more substances are changed into others
   • there was a chemical reaction of the lime with the ground water

Từ đồng nghĩa

• response
• chemical reaction