a.

1. 广大的；广阔的；广泛的；大规模的
   We had fairly extensive discussions.

   我们进行了相当广泛的讨论。

   They own extensive land by the ocean.

   他们拥有海边的辽阔土地。

2. 大量的；庞大的
   The storm caused extensive damage.

   风暴造成了巨大的损害。

adj.

1. covering a large area.
   ▸large in amount or scale.
2. (of agriculture) obtaining a relatively small crop from a large area with a minimum of capital and labour. Often contrasted with intensive.