theory
🇺🇸
/ˈθiːəri/
🇬🇧
/ˈθɪəri/
noun
B1
A set of ideas that tries to explain something.
The theory says that the Earth goes around the Sun.
B1
The basic ideas that a subject is built on.
We learned the theory of how airplanes fly.
B1
An idea that someone thinks is true but hasn't been proven yet.
The detective had a theory about who did the crime.
translation
A set of ideas that tries to explain something.; The basic ideas that a subject is built on.; An idea that someone thinks is true but hasn't been proven yet.
Word Forms
Plural
theories