'busyness' definitions:

Definition of 'busyness'

From: WordNet
noun
The state of being or appearing to be actively engaged in an activity; "they manifested all the busyness of a pack of beavers"; "there is a constant hum of military preparation" [syn: busyness, hum]

Definition of 'busyness'

From: GCIDE
  • busyness \busyness\ n. the state of being or appearing to be actively engaged in an activity; as, they manifested all the busyness of a pack of beavers. [WordNet 1.5]