IPA: /ˈtrɪb.juːn/
KK: /ˈtrɪbjun/
A person who defends or supports the rights and interests of the people, especially in a political context.
The tribune spoke passionately about the need for social justice.
Tribune → It is derived from the Latin word "tribunus" (meaning a leader or magistrate), which is related to "tribus" (meaning tribe). The term originally referred to an official who represented the interests of the tribes in ancient Rome.
Think of a 'tribe' ('tribus') being represented by a leader ('tribunus') — that's why a tribune is a leader or representative of a group.