Pronunciation: (i-fem'u-ron", -ur-un), [key]
—pl. -er•aPronunciation: (-ur-u), [key] -er•ons.
1. anything short-lived or ephemeral.
2. ephemera,items designed to be useful or important for only a short time, esp. pamphlets, notices, tickets, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.