Because of the rigors of experimentation and control, it is understood to be more likely to be true than a hypothesis is. In non-scientific use, however, hypothesis and theory are often used interchangeably …

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Theories are analytical tools for understanding, explaining, and making predictions about a given subject matter. There are theories in many and varied fields of study, including the arts and sciences.

In science, an explanation or model that covers a substantial group of occurrences in nature and has been confirmed by a substantial number of experiments and observations. A theory is more …

THEORY definition: 1. a formal statement of the rules on which a subject of study is based or of ideas that are…. Learn more.

theory, n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

A theory is a formal idea or set of ideas that is intended to explain something. Marx produced a new theory about historical change based upon conflict between competing groups.

Oct 23, 2025 · A theory is based upon a hypothesis and backed by evidence. Learn more about psychology theories and how they are used, including examples.

Feb 21, 2026 · Scientists and creationists are understanding the word "theory" in two very different senses. Evolution is a theory in the same sense as the heliocentric theory.

THEORY meaning: 1 : an idea or set of ideas that is intended to explain facts or events; 2 : an idea that is suggested or presented as possibly true but that is not known or proven to be true