1. To continue traveling at a steady, continuous pace in a boat or plane. It was exhilarating at first, and then it became incredibly serene as we sailed along over the fields in the tiny airplane. We were sailing along, minding out own business, when suddenly a whole pod of whales began breaching right alongside us!

2. To follow a particular route or course while traveling in a boat or plane. We sailed along the Gulf Stream at a very fast clip. Instead of sailing along the original course, the pilot diverted the plane over Albany to avoid the inclement weather in Buffalo.