WordNet
Usage examples of "plural form".
But then it occurred to Mary that it might be a plural form, and so she tried what she guessed would be the singular, although that looked like it could be a plural in its own right: “.
They compose a third person singular that retains the plural form's indifference, or indeterminacy, as to (biological, social, or grammatical) gender.
Today there were no sevdreyen (I must become accustomed to that plural form!
He had deliberately used the plural form of address, thus not only including the men but himself as well.