discrepancy. n, pl-cies. 1. a conflict or variation, as between facts, figures, or claims. Usage: Discrepancy is sometimes wrongly used where disparity is meant. A discrepancy exists between things which ought to be the same; it can be small but is usually significant. A disparity is a large difference between measurable things such as age, rank, or wages. (dɪˈskrɛp ən si). n., pl.