Reaction | Mean of reaction in English Dictionary

/riˈækʃən/

• Noun
• the way someone acts or feels in response to something that happens, is said, etc.
1. Their reaction to the news was positive.
2. When I told him what happened, his immediate reaction was one of shock.
3. The announcement produced an angry/stunned reaction from most of the people at the meeting.
4. My first reaction when I met him was not to trust him.
5. There has been a mixed reaction [=people have reacted in different ways] to the new policy.
6. There hasn't yet been much reaction to the announcement.
7. The newspaper received many angry letters in reaction to [=in response to] the editorial.
• an action or attitude that shows disagreement with or disapproval of someone or something
1. The modernist movement in literature was a reaction against traditional literary conventions.
2. There has been strong reaction against the government's policies.
• the ability to act and move quickly in order to avoid sudden danger
1. A good driver has quick reactions.
2. The speed of his reactions saved his life.

• an occurrence in which your body is affected by a drug, food, etc., in usually a bad way
1. I had/suffered a (bad) reaction to the medicine.
2. Something she ate caused/triggered an allergic reaction.
3. There is a risk of adverse reaction to the medicine.
• a chemical change that occurs when two or more substances combine to form a new substance
1. The reaction of hydrogen with oxygen makes water.
2. chemical reactions
3. a substance produced by chemical reaction
• a process in which the nucleus of an atom is changed by being split apart or joined with the nucleus of another atom
• a physical force that opposes the action of an equal and opposite force
1. For every action, there is an equal and opposite reaction.
• a strong tendency or desire to oppose new political or social ideas
1. They have had to fight against the forces of reaction.