Theory Definition
thēə-rē, thîrē
theories
noun
theories
A mental viewing; contemplation.
Webster's New World
A speculative idea or plan as to how something might be done.
Webster's New World
A formulation of apparent relationships or underlying principles of certain observed phenomena which has been verified to some degree.
Webster's New World
A set of theorems that constitute a systematic view of a branch of mathematics.
American Heritage Medicine
That branch of an art or science consisting in a knowledge of its principles and methods rather than in its practice; pure, as opposed to applied, science, etc.
Webster's New World
Synonyms:
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Other Word Forms of Theory
Noun
Singular:
theory
Plural:
theoriesOrigin of Theory
From Late Latin theōria, from Ancient Greek θεωρία (theōria, “contemplation, speculation, a looking at, things looked at"), from θεωρέω (theōreō, “I look at, view, consider, examine"), from θεωρός (theōros, “spectator"), from θέα (thea, “a view") + ὁράω (horaō, “I see,look").
From Wiktionary
Late Latin theōria from Greek theōriā from theōros spectator probably theā a viewing -oros seeing (from horān to see)
From American Heritage Dictionary of the English Language, 5th Edition
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