pre·ci·sion
pri-ˈsi-zhən
2
a
: the degree of refinement with which an operation is performed or a measurement stated compare accuracy sense 2b
b
: the accuracy (as in binary or decimal places) with which a number can be represented usually expressed in terms of the number of computer words available for representation
double precision arithmetic permits the representation of an expression by two computer words
1
: adapted for extremely accurate measurement or operation
2
: held to low tolerance in manufacture
3
: marked by precision of execution
Did you know?
Many of us often use precision and accuracy as synonyms, but not scientists and engineers. For them, accuracy describes a particular measurement—that is, how close it is to the truth. But precision describes a measurement system—that is, how good it is at giving the same result every time it measures the same thing. This may be why even nonscientists now often speak of "precision instruments" for measuring, "precision landings" made by airplanes, "precision drilling" for natural gas, and so on.
Cite this Entry
“Precision.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/precision. Accessed 12 Jul. 2026.
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