- n (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
- n an idea evoked by some experience
his reaction to the news was to start planning what to do
- n a bodily process occurring due to the effect of some antecedent stimulus or agent
a bad reaction to the medicine
- n (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
- n 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
- n extreme conservatism in political or social matters
the forces of reaction carried the election
- n doing something in opposition to another way of doing it that you don't like
his style of painting was a reaction against cubism
- Photographs of reactions to the tragedy.
- When you have a food allergy, it doesn't take much to trigger a reaction.
- There are many reactions that occur from those kinds of exposures," he says.
- Ayub Khan in Common Dreams (press release)
The locality has been a hub of militants. Locals set up a militia and expelled the militants from this area. This attack seems to be a reaction to their expulsion,Ayub Khan, the local police chief, told reporters.
- President Bush in USA Today
Bush said decisions about troop levels will be based on a "calm assessment" by military commanders in Iraq, and "not a nervous reaction by Washington politicians to poll results in the media."
- Thierry Henry in Independent
In yesterday's 220-word statement, Henry said that his handball in the build-up to William Gallas' goal had been "an instinctive reaction to a ball that was coming extremely fast in a crowded penalty area".