"A definition is nothing else but an explication of the meaning of a word, by words whose meaning is already known. Hence it is evident that every word cannot be defined; for the definition must consist of words; and there could be no definition, if there were not words previously understood without definition."

Source : Thomas Reid, William Hamilton, Harry M. Bracken, Thomas Reid, Sir William Hamilton (1967). “Philosophical Works”, p.219, Georg Olms Verlag

Thomas Reid

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