It is a symbolic portion of that estate that gives this work its title.  
One character in this work frequently displays tricky billiard shots and then launches into long rhetorical speeches, and when he is stopped, always mutters, "I am silent."  His nephew had drowned and was close friends with Peter Trofimov, who is very close with his niece Anya.  Anya is the daughter of Madame Ranevsky, who is finally forced to sell her estate to Lopahkin, a former servant.  It is a symbolic portion of that estate that gives this work its title.  FTP, name this play by Anton Chekhov.
One character in this work frequently displays tricky billiard shots and then launches into long rhetorical speeches, and when he is stopped, always mutters, "I am silent."  
The Cherry Orchard