roundtrip

or round-trip also round trip (round'trĭp')
n.
A trip from one place to another and back, usually over the same route.

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From the source to a destination and back to the source again. See also round tripping.

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A journey to a given place and back again, usually over the same route; also, a ticket for such a trip. For example, The fare for a round trip is generally lower than for two one-way journeys. [Mid-1800s]

For a list of words related to round trip, see:

• Parts, Practices, and Argot - round trip: journey to specific destination and back to starting point over same route
• Travel and Tourism - round trip: travel from starting point to destination and back again; fare or ticket providing for such a journey

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