1
: a stack of hay
2
: a vertical standing wave in turbulent river waters
Examples of haystack in a Sentence
Recent Examples on the Web
Needle in a haystack Finding the tiny needles required a thorough and precise excavation, Pelton said.
—
Katie Hunt, CNN, 4 Dec. 2024
Intelligence agencies have always had to find needles in haystacks.
—Amy Zegart, Foreign Affairs, 16 Apr. 2019
The security and performance-monitoring systems attached to the networks collect untold haystacks of data on a daily basis.
—IEEE Spectrum, 25 Jan. 2013
Getting a great deal on a flight is starting to feel like searching for that proverbial needle in a haystack.
—Stacey Leasca, Travel + Leisure, 19 Oct. 2024
See all Example Sentences for haystack 
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Katie Hunt, CNN, 4 Dec. 2024
Intelligence agencies have always had to find needles in haystacks.
—Amy Zegart, Foreign Affairs, 16 Apr. 2019
The security and performance-monitoring systems attached to the networks collect untold haystacks of data on a daily basis.
—IEEE Spectrum, 25 Jan. 2013
Getting a great deal on a flight is starting to feel like searching for that proverbial needle in a haystack.
—Stacey Leasca, Travel + Leisure, 19 Oct. 2024
See all Example Sentences for haystack
Dictionary Entries Near haystack
Cite this Entry
“Haystack.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/haystack. Accessed 17 Dec. 2024.
Copy CitationKids Definition
haystack
noun
hay·stack
-ˌstak 
: a stack of hay
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