noun. noun \ËnauÌn\. : a word or phrase that is the name of something (as a person, place, or thing) and that is used in a sentence especially as subject or object of a verb or as object of a preposition.Spanish Central: Spanish translation of noun. a word that is the name of something (such as a person, animal, place, thing, quality, idea, or action) and is typically used in a sentence as subject or object of a verb or as object of a preposition.