We found 22 dictionaries that define the word frustrating:

General (18 matching dictionaries)

1. frustrating: Merriam-Webster
2. frustrating: Collins English Dictionary
3. frustrating: Vocabulary.com
4. Frustrating, frustrating: Wordnik
5. frustrating: Wiktionary
6. frustrating: Dictionary.com
7. frustrating: Cambridge Essential American English Dictionary
8. Frustrating: Online Plain Text English Dictionary
9. frustrating: Rhymezone
10. frustrating: AllWords.com Multi-Lingual Dictionary
11. frustrating: Webster's 1828 Dictionary
12. frustrating: FreeDictionary.org
13. frustrating: Mnemonic Dictionary
14. frustrating: TheFreeDictionary.com
15. frustrating: Cambridge Advanced Learner's Dictionary
16. frustrating: Longman Dictionary of Contemporary English

Business (2 matching dictionaries)

17. frustrating: Merriam-Webster Legal Dictionary
18. frustrating: Legal dictionary

Medicine (1 matching dictionary)

19. frustrating: Merriam-Webster Medical Dictionary

Slang (1 matching dictionary)

20. frustrating: Urban Dictionary

(Note: See frustrate as well.)

Definitions from Wiktionary ( ) ▸ adjective:  Discouraging; causing annoyance or anger by excessive difficulty. Similar: frustrative, frustration, discouraging, thwarting, preventive, foiling, preventative, maddening, infuriating, provocative, more... Opposite: satisfying, gratifying, rewarding Types: annoying, more... Phrases: saying frustrating, intriguing but frustrating, frustrating event, very frustrating, baffling frustrating, more... Colors:     gray,     red,     black,     dark blue,     brown, more... ▸ Words similar to frustrating ▸ Usage examples for frustrating ▸ Idioms related to frustrating ▸ Wikipedia articles (New!) ▸ Popular nouns described by frustrating ▸ Words that often appear near frustrating ▸ Rhymes of frustrating ▸ Invented words related to frustrating