Definition of precision
- double precision arithmetic permits the representation of an expression by two computer words
I admire the precision of her work.
the company that measures TV ratings prides itself on the precision of its calculations
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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.
The airplane made a precision approach for landing.
: the quality of being precise : exactness or accuracy
: designed for very accurate measurement or operation
: done in a very careful and exact way
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