Definition: In English, a gerund (noun "verb") refers to an action that has been initiated by another verb. Here's a short explanation of gerunds: A gerund is a noun that functions as an infinitive in its own right. This means it can be used as the subject and verb of a sentence or phrase without any other modifiers, such as prepositions, articles, etc., to convey information about the action being described. For example: "He was walking." Here, "he" is the gerund and "walking" is an infinitive that describes the action of walking. In this example, no other modifiers are needed to convey the intended meaning. Here's a more detailed definition: A gerund has its own subject (the noun "verb" in this context), and it can be used as the subject or the verb of a sentence. A gerund functioned as an infinitive when it is added to a verb or other grammatical structure, providing additional information about the action being performed. For example: 1. The verb "walk" (wALK) acts as the gerund in this sentence: "She walked out." 2. In this example, "she" is the subject of the gerund and "out" is an infinitive that describes the action of walking. It's important to note that gerunds are not used in all forms of English grammar, especially when they follow a noun or pronoun after it. However, in many cases, they are used as part of sentences where no other modifiers are needed (e.g., "He is going to play basketball.")