We found 24 dictionaries that define the word bells and whistles:

General (14 matching dictionaries)

1. bells and whistles: Merriam-Webster
2. bells and whistles: Oxford Learner's Dictionaries
3. bells and whistles: American Heritage Dictionary of the English Language
4. bells and whistles: Collins English Dictionary
5. bells and whistles: Cambridge Advanced Learner's Dictionary
6. bells and whistles: Wiktionary
7. bells and whistles: Infoplease Dictionary
8. bells and whistles: Dictionary.com
9. Bells and whistles, The Bells and Whistles: Wikipedia, the Free Encyclopedia
10. bells and whistles: TheFreeDictionary.com
11. Bells and whistles: World Wide Words
12. bells and whistles: Longman Dictionary of Contemporary English

Business (2 matching dictionaries)

13. bells and whistles: Financial dictionary
14. BusinessDictionary.com (No longer online)

Computing (5 matching dictionaries)

15. bells and whistles: Free On-line Dictionary of Computing
16. bells-and-whistles: Netlingo
17. Bells and Whistles, bells and whistles: CCI Computer
18. Webopedia (No longer online)
19. bells and whistles: Encyclopedia

Medicine (1 matching dictionary)

20. online medical dictionary (No longer online)

Miscellaneous (1 matching dictionary)

21. bells and whistles: Idioms

Slang (1 matching dictionary)

22. bells and whistles: Urban Dictionary

Definitions from Wiktionary (bells and whistles) ▸ noun:  (idiomatic) Extra features added for show rather than function; fancy additions or features. Similar: overembellishment, featuritis, bedizenry, extra, bling, glitz, overdecoration, foofaraw, detail, song and dance, more... Phrases: without bells and whistles, more... Adjectives: frilly, jazzy, broadway, garish, jaunty, stagy, fine, splashy, showy, flashy, orgulous ▸ Words similar to bells and whistles ▸ Usage examples for bells and whistles ▸ Idioms related to bells and whistles ▸ Wikipedia articles (New!) ▸ Words that often appear near bells and whistles ▸ Rhymes of bells and whistles ▸ Invented words related to bells and whistles