Metrology includes all aspects with reference to measurements, whatever their level of accuracy.

The closeness between a test result and accepted value.

The distance between the expected value and the accepted reference value.

The set of operations that established the relationship between values indicated by instruments and the corresponding values given by standards under specified conditions.

Slow to change of a metrological characteristic of measuring instrument.

The smallest chance of the measured quantity which changes the indication of a measuring instrument.

A measured result can be related to references

The closeness of agreement between independent test results obtained under stipulated conditions.

Represents the quantification of doubt in the measured value.

Difference between the measured value and the true value.

Accuracy and Precision are just the same.