摘自International vocabulary of metrology — Basic and general concepts and associated terms (VIM)-2008:
4.14
resolution
smallest change in a quantity being measured that causes a perceptible change in the corresponding indication
NOTE Resolution can depend on, for example, noise (internal or external) or friction. It may also depend on the value of a quantity being measured.
4.15 (5.12)
resolution of a displaying device
smallest difference between displayed indications that can be meaningfully distinguished