An Anarchist

1. One who believes in or advocates the absence of hierarchy and authority in most forms (compare anarchism), especially one who works toward the realization of such.
2. One who disregards laws and social norms as a form of rebellion against authority.
3. (by extension) One who promotes chaos and lawlessness. Synonym: nihilist
4. One who resents outside control or influence on their life, in particular a government, and therefore desires the absence of political control.

Usage notes

• Self-identified anarchists in sense 1 may object to the use of this term in senses 2 and 3.