(n.) One who collects things which are separate; esp., one who makes a business or practice of collecting works of art, objects in natural history, etc.; as, a collector of coins.
(n.) A compiler of books; one who collects scattered passages and puts them together in one book.
(n.) An officer appointed and commissioned to collect and receive customs, duties, taxes, or toll.
(n.) One authorized to collect debts.
(n.) A bachelor of arts in Oxford, formerly appointed to superintend some scholastic proceedings in Lent.