noun

• (grammar) A verbal form that functions as a verbal noun. (In English, a gerund has the same spelling as a present participle, but functions differently; however, this distinction may be ambiguous or unclear and so is no longer made in some modern texts such as A Comprehensive Grammar of the English Language and The Cambridge Grammar of the English Language)
  "Compounds in which gerunds are the second element look exactly like compounds in which present participles are the second element, but different principles of hyphenation apply."
• (grammar) In some languages such as Dutch, Italian or Russian, a verbal form similar to a present participle, but functioning as an adverb to form adverbial phrases or continuous tense. These constructions have various names besides gerund, depending on the language, such as conjunctive participles, active participles, adverbial participles, transgressives, etc.
  "The Spanish gerund is quite unlike the English -ing form (‘walking’, ‘replying’, ‘saying’, etc.), which can function as a gerund, a present participle, a noun or an adjective; and it is also unlike the French form ending in -ant, which covers the functions of both the Spanish gerund and the adjectival form in -ante, -(i)ente discussed at 19.4."