Definition: 1. A well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena. 2. A tentative theory about the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena. 3. A belief that can guide behavior.
Use 'theory' in a sentence:
1. Is there any corroborative evidence for this theory?
2. It was a theory unsupported by evidence.
3. This theory can be confirmed experimentally.
4. She supports her theory with copious evidence.
5. There is only fragmentary evidence to support this theory.
6. His latest theory has been shot down in flames.
7. In theory I'm on call day and night.
8. His theory has proved durable.
9. Historical evidence lends credence to his theory.
10. Unhappily the facts do not wholly bear out the theory.
11. The theory has now been disproved.
12. This ridiculous theory is based on a series of wrong assumptions.
13. Tell me, what do you think of my theory?
14. A theory should be internally consistent.
15. Scientists have a fairly negative attitude to the theory.
16. The course teaches you the theory but there's no substitute for practical experience.
17. Locke originated this theory in the 17th century.
18. This latest evidence lends support to her theory.
19. The theory has been superseded by more recent research.
20. A recent book has demolished this theory.
21. The team are now putting their theory to the test.
22. I have this theory that most people prefer being at work to being at home.
23. The article advances a new theory to explain changes in the climate.
24. In theory, these machines should last for ten years or more.
25. What are you basing this theory on?
26. We found further scientific evidence for this theory.
27. At the moment it is only a theory.
28. The facts certainly fit your theory.
29. That sounds fine in theory, but have you really thought it through?
30. The theory remains untested.
31. And that's where the theory falls down.
32. His book explains the theory for the lay public.
33. The next step is to put the theory into practice.
34. The theory supposes the existence of life on other planets.
35. The comparison shows considerable disagreement between theory and practice.
36. The theory does not apply universally.
37. According to the theory of relativity, nothing can travel faster than light.
38. The statistics offer further support for our theory.
