We found 11 dictionaries that define the word how-do-you-do:

General (9 matching dictionaries)

1. how-do-you-do: Oxford Learner's Dictionaries
2. how-do-you-do, how-do-you-do: Collins English Dictionary
3. how-do-you-do: Vocabulary.com
4. how-do-you-do: Dictionary.com
5. how-do-you-do: Rhymezone
6. how-do-you-do: FreeDictionary.org
7. how-do-you-do: Mnemonic Dictionary
8. how-do-you-do: TheFreeDictionary.com
9. how-do-you-do: Wiktionary

Slang (2 matching dictionaries)

10. how-do-you-do, how-do-you-do: Green’s Dictionary of Slang
11. how-do-you-do: Urban Dictionary

(Note: See how-do-you-dos as well.)

Definitions from Wiktionary (How-do-you-do) ▸ noun:  Alternative form of how do you do [(UK, euphemistic) A difficult situation] Opposite: goodbye, farewell, adieu Types: Hi, Hello, Goodbye, Aloha, Ciao, Bonjour, Greetings, more... ▸ Words similar to how-do-you-do ▸ Usage examples for how-do-you-do ▸ Idioms related to how-do-you-do ▸ Wikipedia articles (New!) ▸ Popular adjectives describing how-do-you-do ▸ Words that often appear near how-do-you-do ▸ Rhymes of how-do-you-do ▸ Invented words related to how-do-you-do