We found 19 dictionaries that define the word piggybacking:

General (9 matching dictionaries)

1. piggybacking: Merriam-Webster
2. piggybacking: Collins English Dictionary
3. piggybacking: Vocabulary.com
4. Piggybacking, piggybacking: Wordnik
5. piggybacking: Cambridge Advanced Learner's Dictionary
6. piggybacking: Wiktionary
7. piggybacking: Dictionary.com
8. Piggybacking (Internet access), Piggybacking (data transmission), Piggybacking (disambiguation), Piggybacking (internet access), Piggybacking (security), Piggybacking: Wikipedia, the Free Encyclopedia
9. piggybacking: TheFreeDictionary.com

Business (4 matching dictionaries)

10. MoneyGlossary.com (No longer online)
11. piggybacking: Webster's New World Finance & Investment Dictionary
12. INVESTORWORDS (No longer online)
13. Piggybacking (disambiguation), Piggybacking: Financial dictionary

Computing (2 matching dictionaries)

14. piggybacking: Free On-line Dictionary of Computing
15. Piggybacking (disambiguation), piggybacking: Encyclopedia

Medicine (1 matching dictionary)

16. online medical dictionary (No longer online)

Slang (3 matching dictionaries)

17. piggybacking: Green’s Dictionary of Slang
18. Piggybacking: Street Terms: Drugs and the Drug Trade
19. piggybacking: Urban Dictionary

(Note: See piggyback as well.)

Definitions from Wiktionary (piggybacking) ▸ noun:  The practice of carrying something piggyback. Similar: pickaback, pig-a-back, backriding, backload, portage, backie, pig upon pork, pork barrelling, van-dragging, ponyback, more... Types: Wi-Fi, Bluetooth, NFC, Zigbee, LoRaWAN, DASH7, Sigfox, LORA, more... Phrases: piggybacking (disambiguation), more... Adjectives: such, adaptive, electronic, physical, multiple, strategic ▸ Words similar to piggybacking ▸ Usage examples for piggybacking ▸ Idioms related to piggybacking ▸ Wikipedia articles (New!) ▸ Popular adjectives describing piggybacking ▸ Words that often appear near piggybacking ▸ Rhymes of piggybacking ▸ Invented words related to piggybacking