1. A thorough, comprehensive examination or investigation of a subject, topic, or field of knowledge
The researcher conducted an in-depth study of the ancient civilization.
O pesquisador realizou um estudo profundo da civilização antiga.
2. Intensive and detailed learning or analysis that goes beyond surface-level understanding
To master this subject, you need an in-depth study of its fundamentals.
Para dominar este assunto, você precisa fazer um estudo profundo de seus fundamentos.