1. (

• concentrate ,
• focus ,
• center ,
• centre ,
• pore ,
• rivet

) direct one's attention on something; "Please focus on your studies and not on your hobbies" ;

2. (

• rivet

) fasten with a rivet or rivets ;

3. (

• rivet ,

) hold (someone's attention); "The discovery of the skull riveted the paleontologists" ;