What are nouns? Nouns or substantives are words that indicate a place, person, thing, quality or action. By definition any member of a class of words that typically can be combined with determiners (see determiner b) to serve as the subject of a verb, can be interpreted as singular or plural, can be replaced with a pronoun, and refer to an entity, quality, state, action, or concept -Merriam Webster
Nouns can function either as the subject or object of a verb, or the object of a preposition. Nouns are the most important part of the English language and make up most of the words. For a detailed set of explanations explaining all the different types of nouns with explanations, click the links below.