0 to do more than is expected or be more successful than others: --
He is a graduate of a prestigious university, who likes to overachieve.
However, her tendency to overachieve can lead to feelings of paranoia, with dramatic or comical results.
In both cases the reason is that overachieving the target produces little benefit, if any.
Thus, the policy implication that more stringent environmental standards should be used would still apply here when the target ground subsidence levels are overachieved.
