- 1based (on something) 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.
- 2(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
- 3-based (in compounds) containing something as an important part or feature lead-based paints a class-based society see also broad-based
NAmE//beɪst//[not before noun]