We found 33 dictionaries that define the word hello:

General (27 matching dictionaries)

1. hello: Merriam-Webster.com
2. hello: Oxford Learner's Dictionaries
3. hello: American Heritage Dictionary of the English Language
4. hello: Collins English Dictionary
5. hello: Vocabulary.com
6. hello: Wordnik
7. hello: Cambridge Advanced Learner's Dictionary
8. hello: Wiktionary
9. hello: Webster's New World College Dictionary, 4th Ed.
10. hello: The Wordsmyth English Dictionary-Thesaurus
11. hello: Infoplease Dictionary
12. Hello, hello: Dictionary.com
13. hello: Online Etymology Dictionary
14. hello: Cambridge Essential American English Dictionary
15. Hello (Adele song), Hello (Hedley album), Hello (Ice Cube), Hello (Ice Cube song), Hello (Karmin EP), Hello (Karmin album), Hello (Karmin song), Hello (Kelly Clarkson song), Hello (Lionel Richie song), Hello (Malayalam film), Hello (Mamamoo EP), Hello (Martin Solveig song), Hello (Mohombi song), Hello (Paradise Kiss), Hello (Poe album), Hello (Poe song), Hello (Stafford Brothers song), Hello (The Beloved song), Hello (The Cat Empire song), Hello (Turn Your Radio On), Hello (airline), Hello (band), Hello (company), Hello (disambiguation), Hello (magazine), Hello (social network), Hello (song), Hello (web series), Hello, Hello: Wikipedia, the Free Encyclopedia
16. Hello: Online Plain Text English Dictionary
17. hello: Webster's Revised Unabridged, 1913 Edition
18. hello: Rhymezone
19. hello: AllWords.com Multi-Lingual Dictionary
20. hello: Free Dictionary
21. hello: Mnemonic Dictionary
22. Hello: The Word Detective
23. hello, hello: Dictionary/thesaurus
24. hello: Wikimedia Commons US English Pronunciations
25. Hello: Wordnik

Computing (2 matching dictionaries)

26. Hello (software): Encyclopedia
27. hello: Free On-line Dictionary of Computing

Miscellaneous (3 matching dictionaries)

28. HELLO: Acronym Finder
29. AbbreviationZ (No longer online)
30. hello: Idioms

Slang (1 matching dictionary)

31. HELLO, hEllo: Urban Dictionary

(Note: See helloing as well.)

Definitions from Wiktionary ( ) ▸ noun:  "Hello!" or an equivalent greeting. ▸ verb:  (transitive) To greet with "hello". Similar: hi, hullo, howdy, how-do-you-do, hollo, halloing, halloo, holloo, haloo, hulloo, more... Opposite: goodbye, farewell, adieu, parting, leave-taking Types: hi, hey, good morning, good afternoon, good evening, more... Phrases: Hello World, hello there, Hello Kitty, hello packet, kiss hello, more... Adjectives: quick, friendly, big, brief, warm, cheery, simple, first, polite, cheerful, casual Colors:     blue,     yellow,     green,     red,     orange, more... ▸ Word origin ▸ Words similar to hello ▸ Usage examples for hello ▸ Idioms related to hello ▸ Wikipedia articles (New!) ▸ Popular adjectives describing hello ▸ Words that often appear near hello ▸ Rhymes of hello ▸ Invented words related to hello