1. A field of knowledge, subject matter, or area of expertise that has been thoroughly investigated and studied with rigor and depth
The professor presented a well-researched domain on medieval history.
O professor apresentou um domínio bem pesquisado sobre história medieval.
2. A specialized area where someone has acquired comprehensive knowledge through extensive research and study
She established herself as an expert in a well-researched domain of neuroscience.
Ela se estabeleceu como especialista em um domínio bem pesquisado de neurociência.