slaveholding noun 2adjective 1forms 1 noun2 •The institution or practice of owning slaves.The slaveholding way of life continued until 1865, when the Thirteenth Amendment to the U.S. Constitution was passed following the end of the Civil War between the Northern and the Southern states — 1992 •An owning of one or more slaves. adjective1 •Having possession/ownership of one or more slaves. formsslaveholdings