Dictionary:

dissidence

  (dĭs'ĭ-dəns)

Disagreement, as of opinion or belief; dissent.

noun

A state of disagreement and disharmony: clash, conflict, confrontation, contention, difference, difficulty, disaccord, discord, discordance, dissension, dissent, dissentience, dissonance, faction, friction, inharmony, schism, strife, variance, war, warfare. See conflict/cooperation.

Definition: difference of opinion
Antonyms: agreement, harmony, peace

Tutor's tip: "Dissidents" (people who disagree or oppose authority) are usually proud of their "dissidence" (disagreement, particularly opposition to) with the government.

The noun has one meaning:

Meaning #1: disagreement; especially disagreement with the government