The Collaborative International Dictionary of English v.0.48:

Engrossment \En*gross"ment\, n.
   1. The act of engrossing; as, the engrossment of a deed.
      [1913 Webster]

            Engrossments of power and favor.      --Swift.
      [1913 Webster]

   2. That which has been engrossed, as an instrument,
      legislative bill, goods, etc.
      [1913 Webster]

WordNet (r) 3.0 (2006):

engrossment
    n 1: complete attention; intense mental effort [syn:
         concentration, engrossment, absorption, immersion]
    2: the mental state of being preoccupied by something [syn:
       preoccupation, preoccupancy, absorption, engrossment]
    3: the quality of being intent and concentrated; "the intentness
       of his gaze" [syn: intentness, engrossment]