1Making a round trip; going somewhere and then coming back.
東京まで往復で4時間かかった。
It took four hours round-trip to Tokyo.
毎日、会社まで往復30分歩いている。
I walk 30 minutes round-trip to the company every day.
出張で大阪へ往復した。
I made a round trip to Osaka on a business trip.
2Abbreviated usage: a round-trip (return) ticket — a ticket covering both the outward and return journeys.
切符売り場で「往復でお願いします」と言った。
I said at the ticket counter, 'A round-trip, please.'
往復切符を買うと割引になることが多い。
Buying a round-trip ticket is often discounted.
3Correspondence: exchanging letters or messages back and forth.
学生時代、彼とは手紙のやり取りが往復で三十通を超えた。
Back in my student days, my correspondence with him grew to more than thirty letters back and forth.
4Visiting each other, socializing — keeping company by going back and forth between places or people.
近所の家々と往復してお祝いを手伝った。
We went back and forth between neighboring houses to help with the celebrations.