The word "extensive" is an adjective that refers to something that is very large in size, area, amount, or range. Here are some examples of how "extensive" can be used:
1. Physical size or area: "The park has an extensive garden area."
2. Amount: "He has an extensive collection of vintage records."
3. Range of knowledge or experience: "She has extensive experience in the field of education."
4. Effort or work: "The project required extensive research and planning."
5. Connection or network: "He has an extensive network of contacts in the industry."
In each of these examples, "extensive" emphasizes the breadth or magnitude of whatever is being described.
