We found 15 dictionaries that define the word letting down:

General (9 matching dictionaries)

1. letting down: Merriam-Webster
2. letting down: Collins English Dictionary
3. letting down: Vocabulary.com
4. letting down: Wiktionary
5. letting down: Dictionary.com
6. letting down: Rhymezone
7. letting down: FreeDictionary.org
8. letting down: Mnemonic Dictionary
9. letting down: TheFreeDictionary.com

Business (2 matching dictionaries)

10. letting down: Legal dictionary
11. letting down: Financial dictionary

Computing (1 matching dictionary)

12. letting down: Encyclopedia

Medicine (2 matching dictionaries)

13. letting down: Merriam-Webster Medical Dictionary
14. letting down: Medical dictionary

Miscellaneous (1 matching dictionary)

15. letting down: Idioms

Definitions from WordNet (letting down) ▸ noun:  the act of causing something to move to a lower level Phrases: letting down gently, letting the side down, letting hair down, letting people down, letting guard down, more... ▸ Words similar to letting down ▸ Usage examples for letting down ▸ Idioms related to letting down ▸ Wikipedia articles (New!) ▸ Words that often appear near letting down ▸ Rhymes of letting down ▸ Invented words related to letting down