Definition of piggyback verb from the Oxford Advanced Learner's Dictionary

 

piggyback

 verb
verb
BrE BrE//ˈpɪɡibæk//
 
; NAmE NAmE//ˈpɪɡibæk//
 
Verb Forms present simple I / you / we / they piggyback
BrE BrE//ˈpɪɡibæk//
 
; NAmE NAmE//ˈpɪɡibæk//
 
he / she / it piggybacks
BrE BrE//ˈpɪɡibæks//
 
; NAmE NAmE//ˈpɪɡibæks//
 
past simple piggybacked
BrE BrE//ˈpɪɡibækt//
 
; NAmE NAmE//ˈpɪɡibækt//
 
past participle piggybacked
BrE BrE//ˈpɪɡibækt//
 
; NAmE NAmE//ˈpɪɡibækt//
 
-ing form piggybacking
BrE BrE//ˈpɪɡibækɪŋ//
 
; NAmE NAmE//ˈpɪɡibækɪŋ//
 
 
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Word Origin mid 16th cent. (as an adverb): the word's origins are uncertain. Phrasal Verbspiggyback on somebody