In linguistics, "gerund"'s a term used to refer to various non-finite verb forms in various languages: As applied to English, it refers to what might be called a verb's action noun (or, alternatively, the name of an action), which's one of the uses of the -ing form. This's also the term's use as applied to Latin; see Latin conjugation. As applied to Spanish and Portuguese, it refers to an adverbial participle (a verbal adverb), called in Spanish the gerundio and in Portuguese the gerúnd… (More on Gerund)