1. A specific, tangible, or well-defined subject of discussion or study, as opposed to an abstract or theoretical one
The presentation focused on a concrete topic: the implementation of renewable energy in urban areas.
A apresentação abordou um tópico concreto: a implementação de energia renovável em áreas urbanas.
2. A subject matter that deals with observable facts or practical matters rather than theories or ideas
Teachers prefer to start with concrete topics that students can relate to their daily lives.
Os professores preferem começar com tópicos concretos que os alunos possam relacionar com suas vidas cotidianas.