We found 5 dictionaries that define the word a needle in a haystack:

General (4 matching dictionaries)

1. a needle in a haystack: Merriam-Webster
2. a needle in a haystack: Oxford Learner's Dictionaries
3. a needle in a haystack: Cambridge Advanced Learner's Dictionary
4. a needle in a haystack: Merriam-Webster

Miscellaneous (1 matching dictionary)

5. a needle in a haystack: Idioms

▸ Words similar to a needle in a haystack ▸ Usage examples for a needle in a haystack ▸ Idioms related to a needle in a haystack ▸ Wikipedia articles (New!) ▸ Words that often appear near a needle in a haystack ▸ Rhymes of a needle in a haystack ▸ Invented words related to a needle in a haystack