Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for theory from the 1913 edition of Webster's Revised Unabridged Dictionary. Define theory using one of the most comprehensive free online dictionaries on the web.

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Part of Speech: noun
Results: 4
1. A doctrine, or scheme of things, which terminates in speculation or contemplation, without a view to practice; hypothesis; speculation.
2. An exposition of the general or abstract principles of any science; as, the theory of music.
4. The philosophical explanation of phenomena, either physical or moral; as, Lavoisier's theory of combustion; Adam Smith's theory of moral sentiments.
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