hirs in English dictionary hirs Meanings and definitions of "hirs" That which belongs to sie; the possessive case of sie, used without a following noun. pronoun (neologism) That which belongs to hir, theirs ( singular). Possessive case of [i]hir, used in place of a noun. Coordinate with his and hers.[/i] more Grammar and declension of hirs hirs possessive pronoun more HIRS Sample sentences with "hirs" Declension Stem Try again Available translations Arabic Chinese French Russian Spanish Authors