Forum is a Latin word used to indicate a place or a space for meeting, or trading. This is not the original etymological meaning (which comes from the verb ferre, to bring - mainly identifiable in the sense of goods that are brought to a market), but the currently prevalent one.
This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page.