The word is derived from Greek, meaning 'presence (of persons)'. In theology, it means the Second Coming of Christ.
Pseudepigraphical Writings
(by Derek A. Olsen:
  Writings attributed to a figure of great antiquity-flourished in the Second Temple period. The intent of attributing the writings to these figures was not deception as we might think but protection and continuity. Since many of these documents were politically and theologically subversive attribution to a figure of the past was safer for the author or community producing the document. Also, it demonstrated a continuity of thought; the author wrote what they believed the patriarch would have written had the opportunity been open to them.