engrossment

1. The act of engrossing; as, the engrossment of a deed.

Engrossments of power and favor.

2. That which has been engrossed, as an instrument, legislative bill, goods, etc.

noun

Total occupation of the attention or of the mind: absorption, enthrallment, immersion, preoccupation, prepossession. See excite/bore/interest.

The noun has 3 meanings:

Meaning #1: complete attention; intense mental effort
  Synonyms: concentration, absorption, immersion

Meaning #2: the mental state of being preoccupied by something
  Synonyms: preoccupation, preoccupancy, absorption

Meaning #3: the quality of being intent and concentrated
  Synonym: intentness