Definitions for Theory
ˈθi ə ri, ˈθɪər ithe·o·ry
This dictionary definitions page includes all the possible meanings, example usage and translations of the word Theory.
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"
hypothesis, possibility, theorynoun
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"
a belief that can guide behavior
"the architect has a theory that more is less"; "they killed him on the theory that dead men tell no tales"
Mental conception; reflection, consideration.
A coherent statement or set of ideas that explains observed facts or phenomena, or which sets out the laws and principles of something known or observed; a hypothesis confirmed by observation, experiment etc.
The underlying principles or methods of a given technical skill, art etc., as opposed to its practice.
A field of study attempting to exhaustively describe a particular class of constructs.
Knot theory classifies the mappings of a circle into 3-space.
A hypothesis or conjecture.
A set of axioms together with all statements derivable from them. Equivalently, a formal language plus a set of axioms (from which can then be derived theorems).
A theory is consistent if it has a model.
Samuel Johnson's Dictionary
Speculation; not practice; scheme; plan or system yet subsisting only in the mind.
Etymology: theorie, Fr. ϑεωρία.
If they had been themselves to execute their own theory in this church, they would have seen being nearer at hand. Richard Hooker, b. v.
In making gold, the means hitherto propounded to effect it are in the practice full of errour, and in the theory full of unsound imagination. Francis Bacon, Nat. Hist. №. 326.
Practice alone divides the world into virtuous and vicious; but as to the theory and speculation of virtue and vice, mankind are much the same. Robert South, Sermons.
A theory is a well-substantiated explanation or framework that is supported by evidence and reasoning, and seeks to understand and explain a phenomenon or set of phenomena. It is usually based on observations, experiments, and logical reasoning, allowing for predictions and the formation of new knowledge. Theories are often subject to scrutiny, evaluation, and potential modification or revision based on new evidence or findings.
a doctrine, or scheme of things, which terminates in speculation or contemplation, without a view to practice; hypothesis; speculation
an exposition of the general or abstract principles of any science; as, the theory of music
the science, as distinguished from the art; as, the theory and practice of medicine
the philosophical explanation of phenomena, either physical or moral; as, Lavoisier's theory of combustion; Adam Smith's theory of moral sentiments
Theory is a contemplative and rational type of abstract or generalizing thinking, or the results of such thinking. Depending on the context, the results might for example include generalized explanations of how nature works. The word has its roots in ancient Greek, but in modern use it has taken on several different related meanings. A theory is not the same as a hypothesis, as a theory is a 'proven' hypothesis, that, in other words, has never been disproved through experiment, and has a basis in fact. One modern group of meanings emphasizes the speculative and generalizing nature of theory. For example in the arts and philosophy, the term "theoretical" may be used to describe ideas and empirical phenomena which are not easily measurable. And by extension of the philosophical meaning, "theoria" is also a word still used in theological contexts. As already in Aristotle's definitions, theory is very often contrasted to "practice" a Greek term for "doing", which is opposed to theory because pure theory involves no doing apart from itself. A classical example of the distinction between theoretical and practical uses the discipline of medicine: medical theory involves trying to understand the causes and nature of health and sickness, while the practical side of medicine is trying to make people healthy. These two things are related but can be independent, because it is possible to research health and sickness without curing specific patients, and it is possible to cure a patient without knowing how the cure worked.
The New Hacker's Dictionary
The consensus, idea, plan, story, or set of rules that is currently being used to inform a behavior. This usage is a generalization 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....”
British National Corpus
Spoken Corpus Frequency
Rank popularity for the word 'Theory' in Spoken Corpus Frequency: #724
Written Corpus Frequency
Rank popularity for the word 'Theory' in Written Corpus Frequency: #1839
Rank popularity for the word 'Theory' in Nouns Frequency: #228
The numerical value of Theory in Chaldean Numerology is: 6
The numerical value of Theory in Pythagorean Numerology is: 1
In theory, theory and practice are the same. In practice, they are not.
There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another theory which states that this has already happened.
A theory can be proved by experiment but no path leads from experiment to the birth of a theory.
(Cesnik) was a nun. The church was her life and the people important to her were in the church, the theory that she was killed because she knew something about abuse that was going on by priests within the church continues to be a theory, but is not the only theory. It continues to be one of several theories.
If Critical Race Theory means that telling a child that once you emerge from the womb you are a racist and a colonizer and whatever else, that's not going to be good. Critical Race Theory's going to create morale problems for everybody, if we're going to teach about African American history, why just keep Critical Race Theory to one month ? Let's teach Critical Race Theory throughout. Let's talk about these things. You can't escape history. Let's talk about the good, the bad and the ugly.
Popularity rank by frequency of use
Translations for Theory
From our Multilingual Translation Dictionary
- teoriaCatalan, Valencian
- نظریه, تئوریPersian
- beachd-smaoinScottish Gaelic
- teoriHaitian Creole
- 推論, 理論, 見解, 推測, 憶測, 定理, 学説Japanese
- teorie, teoriiRomanian
- гипотеза, теорияRussian
- tèōrija, тѐо̄ријаSerbo-Croatian
- teorod, teorVolapük
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"Theory." Definitions.net. STANDS4 LLC, 2023. Web. 5 Dec. 2023. <https://www.definitions.net/definition/Theory>.