'Calibration' definitions:

Definition of 'calibration'

From: WordNet
noun
The act of checking or adjusting (by comparison with a standard) the accuracy of a measuring instrument; "the thermometer needed calibration" [syn: calibration, standardization, standardisation]

Definition of 'Calibration'

From: GCIDE
  • Calibration \Cal`ibra"*tion\, n. The process of estimating the caliber a tube, as of a thermometer tube, in order to graduate it to a scale of degrees; also, more generally, the determination of the true value of the spaces in any graduated instrument. [1913 Webster]