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Theory   /θˈɪri/  /θˈiəri/   Listen
Theory

noun
(pl. theories)
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.  "True in fact and theory"
2.
A tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena.  Synonyms: hypothesis, possibility.  "He proposed a fresh theory of alkalis that later was accepted in chemical practices"
3.
A belief that can guide behavior.  "They killed him on the theory that dead men tell no tales"



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theory of dissociation
theory of electrolytic dissociation
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theory of gravity
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theory of inheritance
theory of organic evolution
theory of preformation
theory of probability
theory of punctuated equilibrium
theory of relativity
theory-based
Arrhenius theory of dissociation
association theory
atomic theory
atomist theory
atomistic theory
big bang theory
big-bang theory
Bohr theory
cell theory
communication theory
continuous creation theory
corpuscular theory
corpuscular theory of light
domino theory
economic theory
Einstein's general theory of relativity
Einstein's special theory of relativity
Einstein's theory of relativity
field theory
Galois theory
game theory
general relativity theory
general theory of relativity
germ theory
gravitational theory
group theory
holistic theory
in theory
information theory
kinetic theory
kinetic theory of gases
kinetic theory of heat
M-theory
Malthusian theory
Newton's theory of gravitation
Ostwald's theory of indicators


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"Theory" Quotes from Famous Books



... Ruskin and art. Beethoven's lofty revelation. The real thing of Schopenhauer. Views of Carlyle, Wagner and Mazzini. Raw materials. Craving for sympathy in artistic type. Evolution of tone-language. French writer of 1835. Prince of Waldthurn, in 1690. Spencer's theory. Controversy and answer. Music of primeval man and early civilizations. The Vedas. Hebrew scriptures. Basis of scientific laws. Church ritual. Folk-music. Influence of crusades. Modern music architect of its own fortunes. Present musical vocabulary and literature. Counsel of Pythagoras. ...
— For Every Music Lover - A Series of Practical Essays on Music • Aubertine Woodward Moore
... reasonable to expect that they would feed against the wind. But there was also the possibility that the outlaw might have herded the band several miles distant during the night, and while I was meditating on this theory, a shot rang out about a mile distant and behind the hill. Giving my horse the rowel, I rode in the direction of the report; but before I reached the hill the manada tore around it, almost running into me. The coyote mustang was leading the band; but as I halted ...
— A Texas Matchmaker • Andy Adams
... irreverence—the Almighty has been made a constitutional Deity, with certain state-grants of worship, but no influence over political affairs. In these matters his aims were generous, if his methods were perniciously mistaken. In his theory of Free Love alone, borrowed like the rest from the Revolution, his aim was as mischievous as his method. At the same time he was at least logical. His theory was repulsive, but comprehensible. Whereas from our present via media—facilitation of divorce—can only result the era when the young ...
— Shelley - An Essay • Francis Thompson
... "Whence knewest thou that he is ensorcelled?"; and she answered, "O my dear papa, there was with me in my childhood an old woman, a wily one and a wise and a witch to boot, and she taught me the theory of magic and its practice; and I took notes in writing and therein waxed perfect, and have committed to memory an hundred and seventy chapters of egromantic formulas, by the least of which I could transport the stones of thy city behind the Mountain ...
— The Book of the Thousand Nights and a Night, Volume 1 • Richard F. Burton
... 'I have a theory, Miss. Morgan, that young ladies ought not to undergo these ordeals. The delicacy of their nervous system unfits them for such a strain. I'm sure we shall all feel very glad when you are successfully through the trial. After it, you ought to ...
— In the Year of Jubilee • George Gissing


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