v.
Variant: also pickaback
Function: adjective
Date: 1823
1 : marked by being up on the shoulders and back <a child needs hugging, tussling, and piggyback rides ― Benjamin Spock>
2 : carried or transported piggyback: as a : of or relating to the hauling of truck trailers on railroad flatcars b : being or relating to something carried into space as an extra load by a vehicle (as a spacecraft)