1. (

• calibrate ,
• graduate ,
• fine-tune ,

) make fine adjustments or divide into marked intervals for optimal measuring; "calibrate an instrument"; "graduate a cylinder" ;

2. (

• calibrate ,

) mark (the scale of a measuring instrument) so that it can be read in the desired units; "he calibrated the thermometer for the Celsius scale" ;

3. (

• calibrate ,

) measure the caliber of; "calibrate a gun" ;