xir UK /zɜː/US /zɜɹ/noun 2determiner 1forms 1 noun2 •(Internet) A humorous term of address to someone of equal or higher rank or position, usually when informing them of something.Xir, you forgot the gigachad image.Your based tradwife, xir. •(Internet, old-fashioned) A humorous term of address to someone assumed to use or be tolerant to neopronouns, as a form of mockery. determiner1 •(nonstandard) Belonging to xe, their (singular). Gender-neutral third-person singular possessive adjective, coordinate with his and her.in the recent past, there was an impeachment trial of a judge where every juror was told to secretly choose xir own standard. — 1999 formsxirs