Meaning of plenary indulgence

ple'nary indul'gence

Pronunciation: [key]
— Rom. Cath. Ch. Rom. Cath. Ch.
  1. a remission of the total temporal punishment that is still due to sin after absolution. Cf.(def. 6).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.