The Wikipedia entry for gerund starts with a list that shows how the term is applied to various languages. And we can see that what the term actually means depends a lot on the specific language we are referring to. For example, it can be a verbal noun in Turkish, an adverbial participle in Portuguese, an adjectival participle in French, part of the infinitive in Hebrew and so on.
As far as I know, the term "gerund" (as many others, like "perfect", "imperfect" etc) was coined by traditional grammarians, focusing primarily on Greek and Latin. But, from a linguistics perspective, is "gerund" a term that can be unambiguously defined for any language? If so, what all these different applications of the term have in common?