Source : Webster's Revised Unabridged Dictionary (1913)

Idleness \I"dle*ness\, n. [AS. [=i]delnes.]
   The condition or quality of being idle (in the various senses
   of that word); uselessness; fruitlessness; triviality;
   inactivity; laziness.

   Syn: Inaction; indolence; sluggishness; sloth.

Source : WordNet®

idleness
     n 1: having no employment [syn: {idling}, {loafing}]
     2: the trait of being idle out of a reluctance to work [syn: {faineance}]