what is a proper noun

A proper noun is a type of noun that refers to a specific person, place, organization, or thing. It is usually written with a capital letter. Examples of proper nouns include names of individuals like "John," names of cities like "London," names of countries like "Canada," and names of businesses like "Apple Inc." Proper nouns are different from common nouns, which refer to general categories of people, places, things, or ideas. To determine if a noun is a proper noun, look for capitalization in the name and consider whether it refers to a specific entity rather than a general category.