Proper way to develop my dictionary?

I want to develop an offline desktop dictionary application using python. Since I want the app to work offline, what is the best way to store words and definitions which can be queried offline from the app.

I am thinking either a big JSON file or sqlite database file which I think can be packed with the app.

I don't even know if this is a proper way to do this. So my questions are

1. Is this a proper way to do this kind of thing?
2. Which way do you suggest?