'Masterpiece' definitions:

Definition of 'masterpiece'

From: WordNet
noun
The most outstanding work of a creative artist or craftsman [syn: masterpiece, chef-d'oeuvre]
noun
An outstanding achievement

Definition of 'Masterpiece'

From: GCIDE
  • Masterpiece \Mas"ter*piece`\, n. Anything done or made with extraordinary skill; a capital performance; a chef-d'oeuvre; a supreme achievement. [1913 Webster]
  • The top and masterpiece of art. --South. [1913 Webster]
  • Dissimulation was his masterpiece. --Claredon. [1913 Webster]