1. Comprehensive and thorough understanding of a subject, going beyond surface-level awareness to grasp underlying principles and complexities
She has a deep knowledge of medieval history.
Ela tem um conhecimento profundo de história medieval.
2. Expert-level familiarity with a topic, skill, or field acquired through extensive study, experience, or practice
His deep knowledge of programming languages made him invaluable to the team.
Seu conhecimento profundo de linguagens de programação o tornou inestimável para a equipe.