LEARNit Dictionary

reaction

noun
B1
OPAL
OPAL
1
B1
what you do, say or think as a result of something that has happened
واکنش, عکس‌العمل
2
B2
a change in people’s attitudes or behaviour caused by disapproval of the attitudes, etc. of the past
واکنش, عکس‌العمل
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.
3
B1
a response by the body, usually a bad one, to a drug, chemical substance, etc.
واکنش
If you have a bad reaction, discontinue use immediately.
to have an allergic reaction to a drug
Adverse reactions to certain foods can take a few days to manifest.
4
the ability to move quickly in response to something, especially if in danger
واکنش, عکس‌العمل, عمل سریع, حرکت سریع
a skilled driver with quick reactions
5
B1
a chemical change produced by two or more substances acting on each other
واکنش, تغییر شیمیایی, تحول شیمیایی
a chemical reaction
a nuclear reaction
To perform the test, add five drops of the solution to the compound and then observe the reaction.
the reaction of oxygen with other atoms
the reaction of chlorine atoms and ozone
see also addition reaction, chain reaction, elimination reaction
6
a force shown by something in response to another force, which is of equal strength and acts in the opposite direction
واکنش, عکس‌العمل
Action and reaction are equal and opposite.
7
opposition to social or political progress or change
مخالفت, ضدیت, ارتجاع
The forces of reaction made change difficult.