From my Big Unabridged Dictionary That Andy Bought Me:
a feeling of utter weariness and discontent resulting from satiety or lack of interest; boredom.
Used in context:
The monk he instantly knew to be the Prior of Jorvaulx Abbey, well known for many miles around as a lover of the chase, of the banquet, and of other worldly pleasures still more inconsistent with his monastic vows. Yet so loose were the ideas of the times respecting the conduct of the clergy, whether secular or regular, that the Prior Aymer maintained a fair character in the neighbourhood of his abbey. His free and jovial temper, and the readiness with which he granted absolution from all ordinary delinquencies, rendered him a favourite among the nobility and principal gentry, to several of whom he was allied by birth, being of a distinguished Norman family. The ladies, in particular, were not disposed to scan too nicely the morals of a man who was a professed admirer of their sex, and who possessed many means of dispelling the ennui which was too apt to intrude upon the halls and bowers of an ancient feudal castle.
From Ivanhoe, page 15