1. A network of people organized at a local or community level, typically for social, political, or activist purposes, originating from ordinary citizens rather than from established institutions or elite groups
The grassroots network mobilized thousands of volunteers to support the environmental campaign.
A rede de base mobilizou milhares de voluntários para apoiar a campanha ambiental.
2. An informal, decentralized organizational structure that builds support or awareness from the community level upward
Social media has made it easier to build grassroots networks for social causes.
As redes sociais facilitaram a construção de redes de base para causas sociais.