We found 16 dictionaries that define the word drop-down menu:

General (13 matching dictionaries)

1. drop-down menu: Merriam-Webster
2. drop-down menu, drop-down menu: Collins English Dictionary
3. drop-down menu: Vocabulary.com
4. drop-down menu: Cambridge Advanced Learner's Dictionary
5. drop-down menu: Dictionary.com
6. Drop-down menu: Wikipedia, the Free Encyclopedia
7. drop-down menu: Rhymezone
8. drop-down menu: FreeDictionary.org
9. drop-down menu: Mnemonic Dictionary
10. drop-down menu: TheFreeDictionary.com
11. drop-down menu: Wiktionary

Computing (2 matching dictionaries)

12. drop-down menu: Free On-line Dictionary of Computing
13. drop-down menu: Encyclopedia

Medicine (1 matching dictionary)

14. online medical dictionary (No longer online)

(Note: See drop-down_menus as well.)

Definitions from Wiktionary (drop-down menu) ▸ noun:  dropdown list Opposite: pull-up menu, pop-up menu, fly-out menu ▸ Words similar to drop-down menu ▸ Usage examples for drop-down menu ▸ Idioms related to drop-down menu ▸ Wikipedia articles (New!) ▸ Words that often appear near drop-down menu ▸ Rhymes of drop-down menu ▸ Invented words related to drop-down menu