1. [ verb ] make fine adjustments or divide into marked intervals for optimal measuring
Synonyms: fine-tune graduate

"calibrate an instrument" "graduate a cylinder"

Related terms: adjust graduation
2. [ verb ] 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"

Related terms: tag calibration
3. [ verb ] measure the caliber of; as of a gun or mortar
Related terms: measure bore
Similar spelling:   calibrated