A person who favors the abolition of any particular institution or practice.
A person who favored or advocated the abolition of slavery.
In favor of the abolition of slavery.
Specifically, someone who supports the Trotskyist political view expressed in the newspaper Militant, or who engages in aggressive left-wing politics.
An entrenched or aggressive adherent to a particular cause, now especially a member of a particular ideological faction.
Fighting or disposed to fight; belligerent, warlike.
Aggressively supporting of a political or social cause; adamant, combative.