theory
Proposed by a contributor, not yet supported by evidence.
Also seen as: theories
Sense 1
A description of an event or system that is considered to be accurate.
Mô tả về một sự kiện hoặc hệ thống được coi là chính xác
Machine-translated — suggest a fix
Noun
Examples
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
A coherent statement or set of ideas that explains observed facts or phenomena and correctly predicts new facts or phenomena not previously observed, or which sets out the laws and principles of something known or observed; a hypothesis confirmed by observation, experiment etc.
Tuyên bố hoặc tập hợp ý tưởng hợp lý giải thích các sự kiện hoặc hiện tượng quan sát được
Machine-translated — suggest a fix
Noun
Examples
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “theory” mean?
A description of an event or system that is considered to be accurate.
Is “theory” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.