What does "get over" mean?

Overcome, surmount, as in We have finally gotten over our biases. “Late 1600s”

Recover from, as in I just got over the flu, or I hope the children get over their parents' divorce quickly. [c. 1700] This usage sometimes appears as get over it, as on a bumper sticker following the 1992 presidential election: “Bush Lost, Get Over It.”

Also, get over with. Complete, have done with, especially something unpleasant. For example, When I finally got the proofreading over, I was ready for a day off, or I'm glad to get all that dental work over with. It also is put as get it over with, as in I might as well sign the check and get it over with. The first usage dates from the late 1800s, the second from the early 1800s.