We found 14 dictionaries that define the word at a loss:

General (12 matching dictionaries)

1. at a loss: Merriam-Webster
2. at a loss: Oxford Learner's Dictionaries
3. at a loss: Collins English Dictionary
4. at a loss: Vocabulary.com
5. at a loss: Wiktionary
6. at a loss: Dictionary.com
7. at a loss: Rhymezone
8. at a loss: FreeDictionary.org
9. at a loss: Mnemonic Dictionary
10. at a loss: TheFreeDictionary.com

Business (1 matching dictionary)

11. at a loss: Merriam-Webster Legal Dictionary

Miscellaneous (1 matching dictionary)

12. at a loss: Idioms

Definitions from WordNet (at a loss) ▸ adverb:  below cost ("Sold the car at a loss") Types: baffled, perplexed, puzzled, confused, bewildered, dazed, stupefied, aghast, more... Phrases: at a loss for words, to be at a loss, be at a loss, at a loss of words, leaves at a loss, more... ▸ Words similar to at a loss ▸ Usage examples for at a loss ▸ Idioms related to at a loss ▸ Wikipedia articles (New!) ▸ Words that often appear near at a loss ▸ Rhymes of at a loss ▸ Invented words related to at a loss