accuracy accuracy /ˈækjʊrəsi/

noun

1. () The quality of being near to the true value  ( truth , accuracy )
   the quality of being near to the true value
    He was beginning to doubt the accuracy of his compass
   he was beginning to doubt the accuracy of his compass
    The lawyer questioned the truth of my account
   the lawyer questioned the truth of my account
   
2. () (mathematics) the number of significant figures given in a number  ( accuracy )
   (mathematics) the number of significant figures given in a number
    The atomic clock enabled scientists to measure time with much greater accuracy
   the atomic clock enabled scientists to measure time with much greater accuracy