This is the 1725th most frequent German word.
forum
A platform for discussion or exchange of ideas.
Here, 'forum' refers to a physical meeting or gathering for discussion.
Das Forum war gut besucht.
The forum was well attended.
In this sentence, 'forum' denotes an online platform for discussion.
Ich habe meine Frage im Online-Forum gestellt.
I posted my question in the online forum.
This usage of 'forum' describes a historical public square or meeting place.