According to Dictionary.com:
the·o·ry [thee-uh-ree, theer-ee
noun, plural the·o·ries.
1. a coherent group of tested general propositions, commonly regarded as correct, that can be used as principles of explanation and prediction for a class of phenomena: Einstein's theory of relativity. Synonyms: principle, law, doctrine.
2. a proposed explanation whose status is still conjectural and subject to…
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