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[ US /ˈθiɝi, ˈθɪɹi/ ]
[ UK /θˈi‍əɹi/ ]
NOUN
  1. a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
    a scientific hypothesis that survives experimental testing becomes a scientific theory
    he proposed a fresh theory of alkalis that later was accepted in chemical practices
  2. a belief that can guide behavior
    they killed him on the theory that dead men tell no tales
    the architect has a theory that more is less
  3. 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
    theories can incorporate facts and laws and tested hypotheses

How To Use theory In A Sentence

  • His work is thus marked with a bitter irony which permeated not only the substance of his theory but also its method.
  • The theory I do not accept: one simply folds his sails, unships his rudder, and waits the will of Providence, or the arrival of some compelling fate. Saunterings
  • Part of the problem in making extrapolations from these patterns to build a theory is that the relationship between language and social structure may vary considerably, both synchronically and diachronically.
  • Physicists like the mathematical beauty of string theory because it banishes the absurdities that pop up when quantum mechanics and gravity combine.
  • For those who don't know about Shannon, he was the father of information theory, which in its simplest form means he made possible the leap from telephones and telegraphs to computers.
  • My first explanation is my theory for the sci-fi physics of the electromagnetic storm.
  • There were weighty arguments against this theory, in particular the fact that people with great muscular strength and a welldeveloped panniculus adiposus were often attacked by the disease; and also that European crews, on a diet containing sufficient protein and fat, were not immune, even when they were given virtually no rice at all. Christiaan Eijkman - Nobel Lecture
  • Their course of study includes elementary hygiene and medical theory.
  • Contrary to what has been claimed, the theory is not insulated against attempts to disconfirm it.
  • differences between theory and praxis of communism
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