Grammatical gender refers to a category or classification of nouns in some languages. It has nothing to do with a living thing's actual gender. In languages with
grammatical gender, nouns are assigned to different gender categories, such as masculine, feminine, or neuter. The gender of a noun affects the articles, pronouns, and adjectives used with it. However, these genders are not related to biological gender, so it can be a bit confusing for non-native speakers.
Full definition
Old English, like the others of its language family, originally had
grammatical gender — masculine, feminine and neuter forms — for nouns and pronouns.