noun / adjective
dissident
DIS-ih-duhnt/ˈdɪsɪdənt/
Publicly opposing official authority or prevailing views, or a person who does so.
The dissident openly criticizes the government's restrictions on free speech.

Etymology
The literal image is someone “sitting apart,” which became a way to express disagreement or nonconformity. In political use, a dissident stands apart from prevailing policy or authority.
In context
The West lauds the dissident, those who stood up to the regime and more often than not paid a tremendous price
More examples
- Dissident lawmakers publicly challenge their party's new policy.
- The government imprisons dissidents who demand free elections.
- The journal welcomes dissident views that challenge the scientific consensus.
Forms
dissident · dissidents
dissidence noun — Public opposition to authority or prevailing views.
Similar words
- dissenter
- Dissenter emphasizes disagreement, which need not be publicly expressed.
- rebel
- Rebel suggests active resistance, sometimes involving force or violence.
- nonconformist
- Nonconformist rejects social conventions, not necessarily official authority.