Synonyms of theory in English:

theory

noun

  • 2 the theory of quantum physics
    principles, ideas, concepts; principled explanations; laws; philosophy, ideology, system of ideas, science
  • Phrases

    in theory

    in theory this method is ideal—in practice it is unrealistic
    [Antonyms] in practice in reality
    in principleon paperin the abstractall things being equalin an ideal worldhypotheticallyFrenchen principe

    Definition of theory in:

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    Word of the day abjure
    Pronunciation: abˈjo͝or
    verb
    solemnly renounce (a belief, cause, or claim)