The Open Dictionary

activist

noun

UK/ˈæk.tɪ.vɪst/
US/ˈæk.tə.vɪst/

Definitions of activist noun

  1. Countablepolitics

    An individual who actively participates in and advocates for political or social change, often through public protests and other direct actions.

    • She is a well-known environmental activist who frequently organizes protests.

    • The group is composed of a number of passionate social justice activists.

    • The human rights activist advocates for equity on a global scale.