Accuracy refers to the closeness of a measured value to standared or known value. For example:- if in lab you obtain a weight measurement of 3.2 Kg foe a given substanc3. But the actual or known weight is 10 kg. then your measurement is not accurate.
It is the measure of the extent to which successive measurements of a physical quantity differ from one another.
Suppose the true value of a measurement is 35.75 and the two measured values are 35.73 and 35.725. Here 35.73 is closest to 35.75, so its accuracy is more than 35.725, but 35.725 is more precise than 35.73 because 35.725 is measured upto after three decimal places.