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Definition of haystack

haystack

/ˈheɪ.stæk/
hay · stack

Plural:haystacks
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haystack Lexical Profile

haystack Game Scores & Validity

• noun

1

A large, disorganized mass of items or data through which one must search to locate something specific, frequently used in metaphorical expressions.

Example

"Finding the single line of buggy code in the software's massive architecture was like looking for a needle in a haystack."


2

A large, solidly packed pile of hay, often built with a conical or ridged top, left in a field for drying or outdoor storage.

Example

"Before the invention of modern balers, farmers spent days building massive haystacks by hand to store winter fodder for their cattle."

Synonyms
View all synonyms for haystack

Word Nuance & Usage

While once a common agricultural term, in modern, non-rural contexts the word is most frequently encountered within the idiom 'a needle in a haystack,' describing an item that is nearly impossible to find.

Word Origin & Etymology

From Middle English 'heistak' or 'hey-stak', a direct compound of 'hay' (dried grass) and 'stack' (pile), originating in the 14th century.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Haystack. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/haystack
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