SLAVEHOLDING
slaveholding
(adjective) allowing slavery; “the slaveholding South”
slavery, slaveholding
(noun) the practice of owning slaves
Source: WordNet® 3.1
Etymology
Adjective
slaveholding (not comparable)
Having possession/ownership of one or more slaves.
Noun
slaveholding (countable and uncountable, plural slaveholdings)
(uncountable) The institution or practice of owning slaves.
(countable) An owning of one or more slaves.
Source: Wiktionary
Slave"hold`ing, a.
Definition: Holding persons in slavery.
Source: Webster’s Unabridged Dictionary 1913 Edition