1. Ride on someone's shoulders or back
   "The child piggybacked on his father through the crowded festival"
    
2. Add to, use or take advantage of an existing work, product, procedure, etc.
   "an amendment to piggyback the current law"
    
3. Support on the back and shoulders
   "He piggybacked her child so she could see the show"
    
4. Haul by railway car
   "The company piggybacked the containers across the country"
    
5. Haul truck trailers loaded with commodities on railway cars
   "They piggybacked the trailers to reduce road congestion"

1. A ride on the back and shoulders of someone else
   "The father gave his tired child a piggyback";
   - pickaback [archaic]

1. On the back, shoulder or astraddle on the hip
   "she carried her child piggyback";
   - pickaback, pig-a-back
    
2. On a railway flatcar
   "the trailer rode piggyback across the country";
   - pickaback, pig-a-back

Derived forms: piggybacks, piggybacking, piggybacked

Type of: alter, bear, carry, change, haul, hold, modify, ride

Encyclopedia: Piggyback