What does the word masterpiece mean?

Usage examples for masterpiece

  1. His address was on a subject in which the people were deeply interested, and was a masterpiece of mingled argument and pathos; and his audience belonged to him. – The Young Man and the World by Albert J. Beveridge
  2. Seriously, I think it a masterpiece, not a word which is not a word of genius. – The George Sand-Gustave Flaubert Letters by George Sand, Gustave Flaubert Translated by A.L. McKensie
  3. That 'orse- he was a masterpiece of mischief! – Beyond by John Galsworthy