1. A person who engages in garimpagem, illegal or informal mining, particularly for gemstones, gold, or diamonds
The garimpeiro searched for diamonds in the riverbed.
O garimpeiro procurava diamantes no leito do rio.
2. An informal or unlicensed miner who works independently or in small groups
Many garimpeiros work in the Amazon region extracting precious metals.
Muitos garimpeiros trabalham na região amazônica extraindo metais preciosos.