noun (n)

• complete attention; intense mental effort(noun.cognition)

  Synonym:
  absorption, concentration, immersion
  

  source: wordnet30
• the mental state of being preoccupied by something(noun.cognition)

  Synonym:
  absorption, preoccupancy, preoccupation
  

  source: wordnet30
• the quality of being intent and concentrated(noun.attribute)

  Synonym:
  intentness
  

  source: wordnet30
• The act of engrossing; as, the engrossment of a deed.(noun)

  source: webster1913