'Lassitude' definitions:

Definition of 'lassitude'

From: WordNet
noun
A state of comatose torpor (as found in sleeping sickness) [syn: lethargy, lassitude, sluggishness]
noun
A feeling of lack of interest or energy [syn: languor, lassitude, listlessness]
noun
Weakness characterized by a lack of vitality or energy [syn: inanition, lassitude, lethargy, slackness]

Definition of 'Lassitude'

From: GCIDE
  • Lassitude \Las"si*tude\ (l[a^]s"s[i^]*t[=u]d), 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. [1913 Webster]
  • The corporeal instruments of action being strained to a high pitch . . . will soon feel a lassitude. --Barrow. [1913 Webster]