Their reaction to the joke is to laugh.
Action and reaction are equal.
The popularity of these old-fashioned views reflects a reaction against the permissiveness of the 1960s.
The forces of reaction were defeated.
1. There has been a very mixed reaction to the decision.
2. Our instinctive reaction when someone causes us pain is to strike back.
3. Adolescent suicide is rarely an impulsive reaction to immediate distress.
4. All new fashion starts out as a reaction against existing convention.
5. Whenever recession strikes, a chain reaction is set into motion.
6. The old lady cackled, pleased to have produced so dramatic a reaction.