What part of speech is theory?

Theory can be categorized as a noun.

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Parts of speech

  • 1. theory is a noun, singular of theories.

Inflections

Noun

What does theory mean?

Definitions

Noun

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"
theory - 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"
theory - 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"

Examples of theory

#   Sentence  
1. noun True in fact and theory.
2. noun The architect has a theory that more is less.
3. noun They killed him on the theory that dead men tell no tales.
4. noun A scientific hypothesis that survives experimental testing becomes a scientific theory.
5. noun He proposed a fresh theory of alkalis that later was accepted in chemical practices.
6. noun It's always a bang-your-head-against-the-wall moment, reading again the play the incompetence theory receives, even from some of the Administration's harshest mainstream critics.
7. noun It's just no longer bureaucratically impolite to openly contest the FBI's (former) theory about a lone, American scientist.
8. noun Finally, the "Hatfill theory" seems to have been exhausted or at least lost public favor.
9. noun The "Hatfill theory" accusing Dr. Stephen Hatfill was always highly dubious.
10. noun The Hatfill theory -- to include ongoing interviews and ongoing 7/24 surveillance by 8 surveillance specialists -- is now the subject of pending civil rights and libel claims of uncertain merit.
11. noun The Hatfill Theory ironically might best be understood as an Al Qaeda theory, with a coincidental Malaysian connection adding to the other circumstances.
12. noun A search of Dr. Ken Berry's residences likely will prove just about the last gasp of a biodefense insider theory.
13. noun The application of recent developments in optimization theory and numerical methods can help Enron to improve further efficiency of our pipeline system and reduce the consumption of compressor fuel.
14. noun But Samuel Alito believes in a little-known Constitutional theory - called the "Unitary Executive Theory" - which says that the President should have complete control over the Executive Branch, and that the Executive Branch should be in charge of almost everything that the Government actually does, including the functions of the Independent Agencies which were designed to be free of Presidential control, and the Military, which exists, which is regulated, and which is funded by specific authority given by the Constitution to Congress, not to the President.
15. noun (I kind of see him to be for animal rights theory as Peter Singer is to the theory of utilitarianism applied to non-human animals).
Sentence  
noun
True in fact and theory.
The architect has a theory that more is less.
They killed him on the theory that dead men tell no tales.
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.
It's always a bang-your-head-against-the-wall moment, reading again the play the incompetence theory receives, even from some of the Administration's harshest mainstream critics.
It's just no longer bureaucratically impolite to openly contest the FBI's (former) theory about a lone, American scientist.
Finally, the "Hatfill theory" seems to have been exhausted or at least lost public favor.
The "Hatfill theory" accusing Dr. Stephen Hatfill was always highly dubious.
The Hatfill theory -- to include ongoing interviews and ongoing 7/24 surveillance by 8 surveillance specialists -- is now the subject of pending civil rights and libel claims of uncertain merit.
The Hatfill Theory ironically might best be understood as an Al Qaeda theory, with a coincidental Malaysian connection adding to the other circumstances.
A search of Dr. Ken Berry's residences likely will prove just about the last gasp of a biodefense insider theory.
The application of recent developments in optimization theory and numerical methods can help Enron to improve further efficiency of our pipeline system and reduce the consumption of compressor fuel.
But Samuel Alito believes in a little-known Constitutional theory - called the "Unitary Executive Theory" - which says that the President should have complete control over the Executive Branch, and that the Executive Branch should be in charge of almost everything that the Government actually does, including the functions of the Independent Agencies which were designed to be free of Presidential control, and the Military, which exists, which is regulated, and which is funded by specific authority given by the Constitution to Congress, not to the President.
(I kind of see him to be for animal rights theory as Peter Singer is to the theory of utilitarianism applied to non-human animals).

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