Definition from Wiktionary, the free dictionary
hir + 's. Compare hers.
- (neologism) That which belongs to hir, theirs (singular). Possessive case of hir, used in place of a noun. Coordinate with his and hers.
1997 July 1, Peter David, Star Trek New Frontier (Book 1), Simon & Schuster, ISBN 9780671013950:
- S/he leaned forward and, to Selar's surprise, took the doctor's hand firmly between hirs.
2000, Peter David, Renaissance, Star Trek New Frontier: Excalibur #2, Simon & Schuster, ISBN 0743422260, page 157:
- She saw that Burgoyne was hefting hirs experimentally, sweeping it through the air. S/he twirled it around a few times, swung it back and forth.
See usage notes for hir.