Collector

noun

1. A person who or thing that collects, or which creates or manages a collection.

   "He is an avid collector of nineteenth-century postage stamps."

2. A person who is employed to collect payments.

   "She works for the government as a tax collector."

3. The amplified terminal on a bipolar junction transistor.
4. A compiler of books; one who collects scattered passages and puts them together in one book.
5. One holding a Bachelor of Arts in Oxford, formerly appointed to superintend some scholastic proceedings in Lent.