$ sudo apt-get update
$ sudo apt-get install goldendict-wordnet 

goldendict-wordnet is installed in your system.

Make ensure the goldendict-wordnet package were installed using the commands given below,

$ sudo dpkg-query -l | grep goldendict-wordnet *

You will get with goldendict-wordnet package name, version, architecture and description in a table

goldendict-wordnet package basic information: