A journey to one or more places and back again, especially by a route that does not cover the same ground twice.A round trip is the term for a journey for travels from one location to another and then back again to the original starting point. A common abbreviation for a round trip in the travel industry is R/T. The standard opposite of a round trip is a one way.

If you make a round trip, you travel to a place and then back again. The train operates the 2,400-mile round trip once a week. A round-trip ticket is a ticket for a train, bus, or plane that allows you to travel to a particular place and then back again.