Weakness characterized by a lack of vitality or energy

• Exhaustion resulting from lack of food
• Lethargy

WordNet Word definitions in WordNet
n. weakness characterized by a lack of vitality or energy [syn: lassitude , lethargy ] exhaustion resulting from lack of food

Wiktionary Word definitions in Wiktionary
n. 1 emptiness. 2 (context medicine English) A state of advanced lack of adequate nutrition, food or water, or a physiological inability to utilize them; starvation. 3 (context philosophy English) A spiritual emptiness or lack of purpose or will to live, ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
c.1400, from Old French inanition , from Latin inanitionem (nominative inanitio ) "emptiness," noun of action from past participle stem of inanire "to empty," from inanis "empty, void, worthless, useless," of uncertain origin.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Inanition \In`a*ni"tion\, n. [F. inanition, L. inanitio emptiness, fr. inanire to empty, fr. inanis empty. Cf. Inane .] The condition of being inane; emptiness; lack of fullness, as in the vessels of the body; hence, specifically, exhaustion from lack of ...