1. An artist who works outside mainstream commercial systems, often creating experimental, avant-garde, or countercultural work that challenges conventional artistic norms
The underground artist refused to sell out and continued creating provocative installations in abandoned warehouses.
O artista underground recusou-se a vender sua alma e continuou criando instalações provocativas em prédios abandonados.
2. An artist associated with subcultural movements, independent music scenes, or alternative art communities
She became famous as an underground artist in the punk rock movement of the 1970s.
Ela ficou famosa como artista underground no movimento punk rock dos anos 1970.