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Elementary Dictionary
       

the·o·ry

theory

 
 
pronunciation:
thir i
features:
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part of speech: noun
inflections: theories
definition 1: A theory is a statement that tries to explain why something happens or why something has happened. A theory comes from a lot of study and thought.
The scientists discussed theories about the beginning of life on Earth.
similar words:
concept, idea
definition 2: A theory is a guess about something based on certain evidence.
The detective has a theory about what happened to diamond.
antonyms:
fact
similar words:
belief, feeling, guess, view
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  learn, thought