1. A subject or theme that is easily understood, well-defined, and unambiguous in discussion or writing
The presentation had a clear topic that everyone could follow.
A apresentação tinha um tópico claro que todos podiam acompanhar.
2. A main subject matter that is distinctly stated and free from confusion
Before starting the meeting, we established a clear topic for discussion.
Antes de começar a reunião, estabelecemos um tópico claro para discussão.