grassroots - definition and synonyms

adjective [usually before noun] 

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/ˈɡrɑːsruːts/
  1. relating to or involving ordinary people, especially in politics

    These individuals are using grassroots activism and community action to protect America’s environment.

    The campaign grew from a one-man crusade into a nationwide grassroots movement.

    This meaning is based on one submitted to the Open Dictionary by: Carlos from Spain on 26/05/2016