mas·ter·piece 
/ˈmæstɚˌpi:s, Brit ˈmɑ:stəˌpi:s/ noun
plural mas·ter·piec·es /ˈmæstɚˌpi:s, Brit ˈmɑ:stəˌpi:s/ noun [count] 1 : a great book, painting, piece of music, movie, etc.
▪ a literary/cinematic masterpiece ▪ The painting was immediately recognized as a masterpiece. ; also : the best book, painting, piece of music, movie, etc., by a particular person
▪ Herman Melville's masterpiece was Moby-Dick. 2 : something done with great skill
▪ a masterpiece of planning ▪ Her study of apes is a masterpiece.
▪ a literary/cinematic masterpiece ▪ The painting was immediately recognized as a masterpiece. ; also : the best book, painting, piece of music, movie, etc., by a particular person
▪ Herman Melville's masterpiece was Moby-Dick.
▪ a masterpiece of planning ▪ Her study of apes is a masterpiece.
