1. A man who associates with or pays for sexual relations with prostitutes or a prostitute: In the ,movie, Jack turned out to be a whoremaster who hung around questionable areas in town, mainly close to the train station.
2. Someone who consorts with whores: A whoremaster can be a lecher or pander and spends a lot of time in dubious parts of town.
3. A pimp who procures whores for customers: A whoremaster is usually a man who finds customers for a prostitute in return for a portion of the prostitute's earnings.