1. a feeling of utter weariness and discontent resulting from satiety or lack of interest; boredom: The endless lecture produced an unbearable ennui.
Synonyms:listlessness, tedium, lassitude, languor.
The perfect word for summer vacation time with kids. Instead of saying "I'm bored", you can have them step up their vocabulary with new phrases such as: "I'm suffering from ennui".
I just like the way it sounds...on whee.