noun.
Listlessness and dissatisfaction resulting from lack of interest; boredom.
The Century Dictionary and Cyclopedia
noun.
A painful or wearisome state of mind due to the want of any object of interest, or to enforced attention to something destitute of interest; the condition of being bored; tedium.
the GNU version of the Collaborative International Dictionary of English
noun.
A feeling of weariness and disgust; dullness and languor of spirits, arising from satiety or want of interest; tedium.
noun.
A gripping listlessness or melancholia caused by boredom; depression (Wikipedia).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the feeling of being bored by something tedious
Word Usage
"Prior to this we'd had limited access to the French word "ennui" - a more grandiose, long-term boredom - but once we had our own word for listless dissatisfaction, we embraced it."