Pronunciation: (las'i-tOOd", -tyOOd"), [key]
1. weariness of body or mind from strain, oppressive climate, etc.; lack of energy; listlessness; languor.
2. a condition of indolent indifference: the pleasant lassitude of the warm summer afternoon.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.