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1. Complete attention; intense mental effort
   - concentration, absorption, immersion
    
2. The mental state of being preoccupied by something
   - preoccupation, preoccupancy, absorption
    
3. The quality of being intent and concentrated
   "the engrossment of his gaze"
   - intentness

Derived forms: engrossments

See also: engross

Type of: assiduity, assiduousness, attention, cognitive state, concentration, state of mind