1. (

• concentration ,
• engrossment ,
• absorption ,
• immersion

) complete attention; intense mental effort ;

2. (

• preoccupation ,
• preoccupancy ,
• absorption ,
• engrossment

) the mental state of being preoccupied by something ;

3. (

• intentness ,
• engrossment

) the quality of being intent and concentrated; "the intentness of his gaze" ;