1. A subject of discussion or conversation that has been left unfinished or is no longer being discussed
We left that topic abandoned and moved on to the next one.
Deixamos aquele tópico abandonado e passamos para o próximo.
2. In online forums or discussions, a thread that has received no recent activity or responses
The discussion about the new policy was an abandoned topic after a few weeks.
A discussão sobre a nova política virou um tópico abandonado depois de algumas semanas.