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theory meaning

[ 'θiəri ]   Pronunciation:
Synonyms of "theory""theory" in a sentence
  • Noun: theory  thee(u)ree
    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
      "theories can incorporate facts and laws and tested hypotheses"; "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
      "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"
      - hypothesis, possibility 
    3. A belief that can guide behaviour
      "the architect has a theory that more is less"; "they killed him on the theory that dead men tell no tales"

    Derived forms: theories

    See also: theoretic, theorist, theorize

    Type of: belief, concept, conception, construct, explanation

    Encyclopedia: Theory

  • [Business]
    AmE ; / noun (plural theories)


    1 [C,U]

    a formal set of ideas that is intended to explain why sth happens or exists:

    Maslow's theory of human motivation

    the boom and bust theory of British economics

    2 [U,C]

    the principles on which a particular activity is based:

    management theory

    the theory and practice of design

    3 [C]

    an opinion or idea that sb believes is true but may in fact be wrong:

    The theory is that CEOs get rich only when shareholders get rich.

    He subscribes to the theory that keeping expenses down is the key to running a business.


    in theory

    used to say that a particular statement is supposed to be true but may in fact be wrong:

    In theory, these machines can last up to ten years.

    This all sounds fine in theory, but would it work in practice?

  • [Electronics]
    A reasonable proposition put forth to account for the behavior of, or the relationships between, bodies and forces, or to explain concepts and their relations. When a theory has stood up under exhaustive tests, it might reveal a scientific law.

  • [Medicine]
    n pl -ries
    1 : the general or abstract principles of a body of fact, a science, or an art ‹the theory and practice of medicine›
    2 : a plausible or scientifically acceptable general principle or body of principles offered to explain natural phenomena ‹a theory of organic evolution› —see ATOMIC THEORY, CELL THEORY, GERM THEORY
    3 : a working hypothesis that is considered probable based on experimental evidence or factual or conceptual analysis and is accepted as a basis for experimentation — the·o·ret·i·cal also the·o·ret·ic adj — the·o·ret·i·cal·ly adv

  • [Computer]
    The consensus, idea, plan, story, or set of rules that is currently being used to inform a behaviour. This usage is a generalisation and (deliberate) abuse of the technical meaning. "What's the theory on fixing this TECO loss?" "What's the theory on dinner tonight?" ("Chinatown, I guess.") "What's the current theory on letting lusers on during the day?" "The theory behind this change is to fix the following well-known screw...."
  • In eighteenth century the theory shrank.
  • These theories drew analogies of them.
  • In theory the plan should have worked.
  • The mathematics of the theory is too formidable.
  • All the facts certainly fit your theory.
  • An example is the kinetic theory of gases.
  • Your theory disaccords with my experience.
  • Let us put his theory to the proof.
  • His theories met with general discredits.
  • theory must not be divorced from practice.
  • More examples:  1  2  3  4  5
What is the meaning of theory and how to define theory in English? theory meaning, what does theory mean in a sentence? theory meaningtheory definition, translation, pronunciation, synonyms and example sentences are provided by eng.ichacha.net.