xennial UK /ˈzɛnɪəl/US /ˈzɛniəl/ noun1 •(informal) A person born late in Generation X or early in Generation Y, that is, sometime in the late 1970s or early 1980s; a member of the Oregon Trail Generation.I’m a reluctant millennial myself (or possibly — God forbid — an xennial), stuck in the pretty common category of not identifying with my so-called generation. — 2023 formsXennials · xennials