On or for a round trip journey, literal or figurative.(phrase)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "there and back" in a sentence
"Father went with us and Charley went to shake the trees, we walked there and back again and gathered chinquapens all day, we were very tired when we got home."
"Based on subsequent analysis of the TV footage showing him running there and back (he used a loping, foot-to-foot stride), his speed appears to have been about 2 miles (3.2 kilometers) per hour."