Lassitude \Las"si*tude\, n. [L. lassitudo, fr. lassus faint, weary; akin to E. late: cf. F. lassitude. See {Late}.] A condition of the body, or mind, when its voluntary functions are performed with difficulty, and only by a strong exertion of the will; languor; debility; weariness. The corporeal instruments of action being strained to a high pitch . . . will soon feel a lassitude. --Barrow. web1913

lassitude n 1: a state of comatose torpor (as found in sleeping sickness) [syn: {lethargy}, {sluggishness}] 2: a feeling of lack of interest or energy [syn: {languor}, {listlessness}] 3: weakness characterized by a lack of vitality or energy [syn: {inanition}, {lethargy}] wn