/las"i toohd', -tyoohd'/ , n.
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.
[ 1525-35; lassitudo weariness, equiv. to lass ( us ) weary + -i- -I- + -tudo -TUDE ]