1. to actively encourage or support the growth, enlargement, or extension of something
The government policies promote expansion of renewable energy sources.
As políticas governamentais promovem a expansão de fontes de energia renovável.
2. to take actions that facilitate the increase in size, scale, or scope of a business or organization
The CEO announced plans to promote expansion into new markets.
O CEO anunciou planos para promover a expansão para novos mercados.