LEARNit Dictionary

theory

noun
B1
OPAL
OPAL
1
B1
a formal set of ideas that is intended to explain why something happens or exists
نظریه, تئوری
see also atomic theory, binding theory, catastrophe theory, chaos theory, critical theory, decision theory, game theory, government and binding theory, grand unified theory, information theory, quantum theory
2
B1
the principles on which a particular subject is based
نظریه, تئوری
the theory and practice of language teaching
This is your chance to put theory into practice .
literary theory
3
B1
an opinion or idea that somebody believes is true but that is not proved
نظریه, فرضیه, پندار, نظر
Theories abound about what happened.
Here's my theory on how the story's going to end.
I don't subscribe to the theory that all Hollywood audiences want a happy ending.
Police are working on the theory that the murderer was known to the family.
see also conspiracy theory