1. To gradually create or develop support for a person, idea, project, or cause by gaining the backing of more people
The campaign is working to build support among young voters.
A campanha está trabalhando para ganhar apoio entre os eleitores jovens.
2. To strengthen an existing base of supporters through continued effort and engagement
We need to build support within the community before launching the initiative.
Precisamos construir apoio dentro da comunidade antes de lançar a iniciativa.