collector

noun:a person who collects things of a particular type, professionally or as a hobby
- My grandfather was a dedicated collector of rare coins.
noun:a person employed to collect payments, such as taxes, rents, or debts
- The debt collector called to discuss the overdue bill.
noun:a device or apparatus that gathers or receives something such as light, heat, or electrical charge
- The solar panel has a collector that concentrates sunlight onto the solar cells.
noun:a container designed to receive and hold a substance, such as water, rain, or waste
- We placed a rain collector in the garden to gather water for the vegetable beds.