/leth"euhr jee/ , n. , pl. lethargies .
1. the quality or state of being drowsy and dull, listless and unenergetic, or indifferent and lazy; apathetic or sluggish inactivity.
2. Pathol. an abnormal state or disorder characterized by overpowering drowsiness or sleep.
[ 1325-75; lethargia lethargía, equiv. to létharg ( os ) drowsy + -ia -Y 3 (see LETHE, -ALGIA); r. ME litargie litargia ]