A theory is a rational type of abstract thinking about a phenomenon, or the results of such thinking. The process of contemplative and rational thinking is often associated with such processes as observational study or research. Theories may either be scientific or other than scientific. (Wi.ki.pe.di.a)
1 : a plausible or scientifically acceptable general principle or body of principles offered to explain phenomena. 2a : a belief, policy, or procedure proposed or followed as the basis of action her method is based on the theory that all children want to learn.
other sources:
https://www.merriam-webster.com/dictionary/theory
hope this helps
_ndrs_
