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Definition of Theory

Theory

  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.
  3. The science, as distinguished from the art; as, the theory and practice of medicine.
  4. The philosophical explanation of phenomena, either physical or moral; as, Lavoisier's theory of combustion; Adam Smith's theory of moral sentiments.

Theory Quotations

My theory on life is that life is beautiful. Life doesn't change. You have a day, and a night, and a month, and a year. We people change - we can be miserable or we can be happy. It's what you make of your life.
Mohammed bin Rashid Al Maktoum

Democracy is beautiful in theory; in practice it is a fallacy.
Benito Mussolini

If you want to know the taste of a pear, you must change the pear by eating it yourself. If you want to know the theory and methods of revolution, you must take part in revolution. All genuine knowledge originates in direct experience.
Mao Zedong

Experience without theory is blind, but theory without experience is mere intellectual play.
Immanuel Kant

If the facts don't fit the theory, change the facts.
Albert Einstein
More "Theory" Quotations

Theory Translations

theory in Dutch is theorie
theory in German is Theorie
theory in Italian is gamma
theory in Portuguese is teoria
theory in Swedish is teori
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