'Moodiness' definitions:

Definition of 'moodiness'

From: WordNet
noun
A sullen gloomy feeling
noun
Having temperamental and changeable moods

Definition of 'Moodiness'

From: GCIDE
  • Moodiness \Mood"i*ness\, n. The quality or state of being moody; specifically, liability to strange or violent moods. [1913 Webster]