1.NounA section of a road or path that crosses over an obstacle, especially another road, railway, etc.
"The homeless man had built a little shelter, complete with cook-stove, beneath a concrete overpass."
2.VerbTo pass above something, as when flying or moving on a higher road.
"Gillian watched the overpassing shoppers on the second floor of the mall, as she relaxed in the bench on the ground floor."
3.VerbTo exceed, overstep, or transcend a limit, threshold, or goal.
"Marshall was really overpassing his authority when he ordered the security guards to fire their tasers at the trespassers.; The precocious student had really overpassed her peers, and was reading books written for children several years older."