What you do, say, or think because of something that happened.
People had different reactions to the news about her promotion.
彼女の昇進のニュースに対して人々は様々な反応を示した。
A change in how people act or think because they dislike past ways.
The new rules are a reaction against the old, loose policies.
新しい規則は、古い緩やかな政策に対する反動である。
How your body responds to a drug, food, or chemical, often in a bad way.
Some people have an allergic reaction to peanuts.
一部の人はピーナッツに対してアレルギー反応を示す。
The ability to act quickly when something happens, especially in danger.
Good drivers need fast reaction times to avoid accidents.
優秀なドライバーは事故を避けるために素早い反応時間が必要だ。
A process where chemicals mix and change into something new.
Mixing baking soda and vinegar causes a chemical reaction.
重曹と酢を混ぜると化学反応が起こる。
A force that pushes back with equal strength when another force acts on it.
In physics, every action has an equal and opposite reaction.
物理学では、あらゆる作用には等しく逆向きの反作用がある。
Resistance to social or political change.
The government faced strong reaction from groups opposed to reform.
政府は改革に反対するグループからの強い反発に直面した。