Let's say we have an example:
Sorry, I just meant something I observe in elsewhere discussions, not in our past topics
Since elsewhere is an adverb, not adjective, the example is ungrammatical. "Other discussions" can be an alternative, but I want to emphasize that those discussions can only be found in unrelated contexts, like in another forums or platforms. "I observe in somewhere else" is good, but I'd like to find an adjective for it. Do you know any?