1. theory

noun. ['ˈθɪri, ˈθiːɝi'] 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.

Rhymes with Theory

• yomiuri

How do you pronounce theory?

Pronounce theory as ˈθɪri.

US - How to pronounce theory in American English

UK - How to pronounce theory in British English

How do you spell theory? Is it thoery ?

A common misspelling of theory is thoery

Sentences with theory

1. Noun, singular or mass
Most people remove the skin, though it is, in theory, edible.

Quotes about theory

1. Very much, string theory is simply a work in progress. What we are inching toward every day are predictions that within the realm of current technology we hope to test. It's not like we're working on a theory that is permanently beyond experiment. That would be philosophy.
- Brian Greene

2. The things that will destroy America are prosperity-at-any-price, peace-at-any-price, safety-first instead of duty-first, the love of soft living, and the get-rich-quick theory of life.
- Theodore Roosevelt

3. I do feel strongly that string theory is our best hope for making progress at unifying gravity and quantum mechanics.
- Brian Greene

2. M-theory

noun. (particle physics) a theory that involves an eleven-dimensional universe in which the weak and strong forces and gravity are unified and to which all the string theories belong.

3. theory-based

adjective. based in theory rather than experiment.

4. theory

noun. ['ˈθɪri, ˈθiːɝi'] a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena.

5. theory

noun. ['ˈθɪri, ˈθiːɝi'] a belief that can guide behavior.