abolitionist

adj

1. In favor of the abolition of any particular institution or practice.
2. (historical)In favor of the abolition of any particular institution or practice.

   “This case, and others, drove and enlarged the existing abolitionist movement in the country, opposed, of course, by the merchants and plantation owners who were making a massive profit from the slaves held in various colonies.”

noun

1. A person favoring or advocating for the abolition of any particular institution or practice.

   “Both feminist and religiously inspired abolitionists have long viewed, and continue to view, male demand for commercial sex as a root cause of prostitution.”

   “Furthermore, abolitionists argue that prisons are a form of violence and should be destroyed because they reflect “a social ethos of violence and degradation" [...] Abolitionists argue that prisons should be replaced, or at least decentralized, by democratic community control and community-based treatment that would emphasize "redress" or "restorative justice."”

2. (US, especially, historical)A person favoring or advocating for the abolition of any particular institution or practice.

   “Among other slave notabilities of the plantation, was one called by everybody Uncle Isaac Copper. It is seldom that a slave gets a surname from anybody in Maryland; and so completely has the south shaped the manners of the north, in this respect, that even abolitionists make very little of the surname of a negro.”