Source : Webster's Revised Unabridged Dictionary (1913)

Languor \Lan"guor\, n. [OE. langour, OF. langour, F. langueur,
   L. languor. See Languish.]
   1. A state of the body or mind which is caused by exhaustion
      of strength and characterized by a languid feeling;
      feebleness; lassitude; laxity.

   2. Any enfeebling disease. [Obs.]

            Sick men with divers languors.        --Wyclif (Luke
                                                  iv. 40).

   3. Listless indolence; dreaminess. Pope. `` German dreams,
      Italian languors.'' --The Century.

   Syn: Feebleness; weakness; faintness; weariness; dullness;
        heaviness; lassitude; listlessness.

Source : WordNet®

languor
     n 1: a relaxed comfortable feeling [syn: {dreaminess}]
     2: a feeling of lack of interest or energy [syn: {lassitude}, {listlessness}]
     3: inactivity; showing an unusual lack of energy [syn: {lethargy},
         {sluggishness}, {phlegm}]