Synonym: attitude, conception, explanation, hypothesis, idea, impression, inference, judgment, opinion, speculation, supposition, thought, view. Antonym: practice. Similar words: theoretical, more or less, theology, the other day, in the open, theological, story, history. Meaning: ['θɪːrɪ /'θɪərɪ] 
n. 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 2. a tentative theory about the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena 3. a belief that can guide behavior.
n. 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 2. a tentative theory about the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena 3. a belief that can guide behavior. 
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181. This theory has been blasted away by the new evidence.
182. Ade couldn't relate the phenomena with any theory he knew.
183. We have a working theory/hypothesis about what caused the crash, which we shall test.
184. In Jungian theory, there are certain archetypes of human personality.
185. You've got nothing on me and you know it. Your theory would never stand up in a court of law.
186. The idea sounds fine in theory, but would it work in practice?
187. According to Marxist theory, a society's superstructure is its legal, social, cultural and political institutions, which are based on its economic systems.
188. These results are in flat contradiction to the theory of relativity.
189. The idea that software is capable of any task is broadly true in theory.
190. We stayed up discussing the finer points of Marxist theory.
191. The book's aim was to make economic theory more digestible.
192. John Bardeen was also co-developer of the theory of superconductivity.
193. His repeated lack of promotion makes nonsense of the theory that if you work hard you'll be successful.
194. This is a practical course, with only a minimal amount of theory.
195. In theory, the journey ought to take three hours, but in practice it usually takes four because of roadworks.
196. The Liverpool team are now putting their theory to the test.
197. The Freudian theory about daughters falling in love with their father has little evidence to support it.
198. The theory was dismissed as a lot of hot air.
199. Zoologist Eugene Morton has propounded a general theory of the vocal sounds that animals make.
200. Detectives are working on a theory that he knew his murderer.
201. It is possible , of course [sentencedict.com], that the converse of this theory may also be true.
202. We should try to learn economic theory and apply it.
202. Sentencedict.com try its best to collect and create good sentences.
203. We shall first look briefly at the historical antecedents of this theory.
204. One theory about the moon is that it is a piece broken off the earth.
205. His ideas were of central importance in the development of the theory.
206. Out on the course you must discipline yourself to let go of detailed theory.
207. The theory of electromagnetism swallowed up the theory of light.
208. In my latest book, I wanted to fly the kite for an unfashionable theory.
209. The theory falls flat on its face when put into practice.
210. This new evidence lends support to the theory that she was murdered.
More similar words: theoretical, more or less, theology, the other day, in the open, theological, story, history, factory, category, territory, inventory, in memory of, from memory, laboratory, regulatory, conciliatory.