A noun that represents something of a single A single person or a single animal, such as a 1 Pocket (bag a) men's 1 person (a man) is generally speaking anything that there is only one unit, called the singular noun.
Noun implies some single person or a single animal, such as a first bag (a bag) for one person (a man) say it is. Whatever we call it, is just one singular noun.
A noun that represents the object only one piece. One person or animal, such as storage 1 leaves (a bag) men 1 (a man) in other words, it was Whatever, with only one unit, we call a singular noun.