theory
🇺🇸
/ˈθiːəri/
🇬🇧
/ˈθɪəri/
A set of ideas that tries to explain something.
The theory says that the Earth goes around the Sun.
その理論によれば、地球は太陽の周りを回っている。
The basic ideas that a subject is built on.
We learned the theory of how airplanes fly.
飛行機が飛ぶ理論を学びました。
An idea that someone thinks is true but hasn't been proven yet.
The detective had a theory about who did the crime.
探偵は誰が犯罪を犯したのかについての理論を持っていました。