an overseer of slaves.
a hard taskmaster:
His boss was a slave driver.
(esp formerly) a person forcing slaves to work
an employer who demands excessively hard work from his employees
noun 1. an owner of slaves. noun 1. a person who owns slaves
noun 1. persons, especially a large group, performing labor under duress or threats, as prisoners in a concentration camp; a labor force of slaves or slavelike prisoners. 2. labor done by slaves. 3. any coerced or poorly remunerated work: Typing at that salary is slave labor.
noun 1. labor camp (def 1).
noun 1. a person in a condition of servility or slavery.