The term "round trip" refers to a journey that involves traveling from one place to another and then returning back to the starting point. It is often used in reference to transportation, such as taking a round-trip flight or train ride, which means going from your originating location to your destination and then coming back again. The term can also be used more broadly to refer to any experience that involves going out and returning, like a round trip vacation where you explore multiple locations before making your way back home.