B1nounscienceacademic
US/ˈθɪr.i/
UK/ˈθɪə.ri/
an explanation of why something happens, based on facts but not yet fully proved
In context
In theory, the new system should save us time.
She has a theory about why the project failed.
The course includes both theory and practical lessons.
Words that go with theory
noun + preposition
- in theoryIn theory it's easy, but in practice it's hard.
adjective + noun
- scientific theoryEvolution is a well-tested scientific theory.
noun + noun
- conspiracy theoryHe believes every conspiracy theory he reads online.
- theory and practiceGood teachers connect theory and practice.
verb + noun
- develop a theoryThe scientist developed a theory about sleep.