Definition of Lassitude Lassitude: Weakness, weariness, listlessness, exhaustion, lethargy. For example, the patient complained of lassitude. From Latin lassitudo, from lassus meaning weary.
Lassitude: Weakness, weariness, listlessness, exhaustion, lethargy. For example, the patient complained of lassitude. From Latin lassitudo, from lassus meaning weary.