Extensive (adjective)

1. Covering or affecting a large area or range.
2. Involving or containing many details or elements.
3. Having a lot of knowledge or experience in a particular subject.

Origin:

From the latin extensus, meaning stretched out or extended.

Examples:

1. The company has an extensive network of distributors worldwide.
2. The research was extensive and covered many aspects of the subject.
3. The artist has an extensive knowledge of art history.
4. The museum has an extensive collection of ancient artifacts.
5. The singer has an extensive repertoire of songs.