Seeing that nouns are items, there can be one or more and this means that nouns are either singular or plural. Singular means there is one, plural means there is more than one. Even a fraction more that one means the noun is plural. That is commonly seen in recipes—1 1/2 cups milk.
Dla mnie to nie ma sensu bo jesli odmierzam ta sama szklanka, no ale z jezykiem sie nie dyskutuje :(