Definitions

1. noun

An area of land from which water drains into a river, lake, or sea, or a region from which water can flow into a particular watercourse.

“The local council is responsible for managing the catchment area to prevent water pollution.”

2. noun

The area or region served by a particular institution or facility, especially a healthcare facility.

“The hospital’s catchment area has a population of over 250,000 people.”