📒 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
- reaction to something What was his reaction to the news?
📒 a change in people’s attitudes or behaviour caused by disapproval of the attitudes, etc. of the past
- The return to traditional family values is a reaction against the permissiveness of recent decades.
- Her rebellious attitude is just a reaction against her strict upbringing.
📒 a response by the body, usually a bad one, to a drug, chemical substance, etc.
- If you have a bad reaction, discontinue use immediately.
- reaction to something to have an allergic reaction to a drug
- Adverse reactions to certain foods can take a few days to manifest.
📒 the ability to move quickly in response to something, especially if in danger
- a skilled driver with quick reactions
- Alcohol has the effect of slowing down your reactions.
- Keenan showed lightning reactions.
📒 a chemical change produced by two or more substances acting on each other
- a chemical reaction
- a nuclear reaction
- To perform the test, add five drops of the solution to the compound and then observe the reaction.
📒 a force shown by something in response to another force, which is of equal strength and acts in the opposite direction
- Action and reaction are equal and opposite.
📒 opposition to social or political progress or change
- The forces of reaction made change difficult.