DISSIDENT
dissentient, dissenting, dissident
(adjective) disagreeing, especially with a majority
dissident, heretical, heterodox
(adjective) characterized by departure from accepted beliefs or standards
dissenter, dissident, protester, objector, contestant
(noun) a person who dissents from some established policy
Source: WordNet® 3.1
Etymology
Adjective
dissident (comparative more dissident, superlative most dissident)
In a manner that disagrees; dissenting; discordant.
Noun
dissident (plural dissidents)
A person who formally opposes the current political structure, the political group in power, the policies of the political group in power, or current laws.
(Christianity) One who disagrees or dissents; one who separates from the established religion.
(Christianity, specifically, historical) Sometimes Dissident: in the kingdom of Poland, the name for Christians not part of the Roman Catholic Church.
Source: Wiktionary
Dis"si*dent, a. Etym: [L. dissidens, -entis, p. pr. of dissidere to
sit apart, to disagree; dis- + sedere to sit: cf. F. dissident. See
Sit.]
Definition: No agreeing; dissenting; discordant; different.
Our life and manners be dissident from theirs. Robynson (More's
Utopia).
Dis"si*dent, n. (Eccl.)
Definition: One who disagrees or dissents; one who separates from the
established religion.
The dissident, habituated and taught to think of his dissidencI.
Taylor.
Source: Webster’s Unabridged Dictionary 1913 Edition