'Boredom' definitions:

Definition of 'boredom'

From: WordNet
noun
The feeling of being bored by something tedious [syn: boredom, ennui, tedium]

Definition of 'Boredom'

From: GCIDE
  • Boredom \Bore"dom\, n.
  • 1. The state of being bored, or pestered; a state of ennui. --Dickens. [1913 Webster]
  • 2. The realm of bores; bores, collectively. [1913 Webster]