In scientific terms, what is the best definition of a theory?

A theory, in scientific terms, is defined as an explanation that is supported by a substantial amount of evidence gathered through observation and experimentation. This evidence comes from multiple studies and data points, providing a robust framework for understanding a particular phenomenon. A theory is not merely a guess or an untested idea; it is a well-substantiated explanation that has withstood rigorous testing and scrutiny over time.

Theories also help to explain and predict various aspects of the natural world, making them essential in advancing scientific knowledge. The process of developing a theory typically involves formulating a hypothesis, conducting experiments, and accumulating evidence that consistently supports the hypothesis. Thus, a theory is seen as a high level of scientific understanding that integrates and synthesizes a large amount of evidence into a cohesive explanation.

While detailed models, testable propositions, and universally accepted principles are important in the scientific process, they lack the comprehensive support and validation that distinguish a scientific theory. In this context, the best understanding of a theory aligns with the idea of being an explanation that is backed by a large body of evidence.