One Directioner noun2 •A fan of the English-Irish pop boy band One Direction.She showed me their first video clip and then I became a “One Directioner” myself. […] (Korina, 7 years old) — 2015 •A member of the English-Irish pop boy band One Direction.Should I strike up a conversation about Justin Bieber, I wondered? Or who her favourite One Directioner was? — 2015 formsOne Directioners