Origin: Latin suffix -tion
Calibration has 2 different meanings across 1 category:
the act of checking or adjusting (by comparison with a standard) the accuracy of a measuring instrument
"the thermometer needed calibration"
The act of calibrating something.
"The technician performed calibration on the scale to ensure it weighed items accurately."
In plain English: Calibration is adjusting something so it works correctly and shows accurate results.
"The technician needed to perform calibration on the scale before weighing any ingredients."
Calibration comes from the verb calibrate, which entered English via French and Latin to mean adjusting an instrument's scale or accuracy. The suffix -ion was added later to form this noun describing that process of adjustment.