EPHEMERON Meaning of EPHEMERON in English n.1 (pl. ephemera) (usu. in pl.) a a thing (esp. a printed item) of short-lived interest or usefulness. b a short-lived thing. 2 (pl. ephemerons) EPHEMERA(1) 1. Etymology: as EPHEMERA(1) Oxford English vocab. Оксфордский английский словарь. 2012