if one thing is based on another, it uses it or is developed from it
The movie is based on a real-life incident.
The report is based on figures from six different European cities.
also in compounds
if a person or business is based in a particular place, that is where they live or work, or where the work of the business is done
We're based in Chicago.
a Chicago-based company
containing sth as an important part or feature
a class-based society