\ ˈstak How to pronounce stack (audio) \

Definition of stack

 (Entry 1 of 2)

1 : a large usually conical pile (as of hay, straw, or grain in the sheaf) left standing in the field for storage
2a : an orderly pile or heap
b : a large quantity or number
3 : an English unit of measure especially for firewood that is equal to 108 cubic feet
4a : a number of flues embodied in one structure rising above a roof
b : a vertical pipe (as to carry off smoke)
c : the exhaust pipe of an internal combustion engine
5a : a structure of bookshelves for compact storage of books usually used in plural
b plural : a section of a building housing such structures
6 : a pile of poker chips
7a : a memory or a section of memory in a computer for temporary storage in which the last item stored is the first retrieved also : a data structure that simulates a stack a push-down stack
b : a computer memory consisting of arrays of memory elements stacked one on top of another


stacked; stacking; stacks

Definition of stack (Entry 2 of 2)

transitive verb

1a : to arrange in a stack : pile
b : to pile in or on stacked the table with books stack the dishwasher
2a : to arrange secretly for cheating stack a deck of cards
b : to arrange or fix so as to make a particular result likely the odds are stacked against us will stack juries to suit themselves— Patrice Horn
3a : to assign (an airplane) by radio to a particular altitude and position within a group circling before landing
b : to put into a waiting line another dozen rigs are stacked up and waiting— P. H. Hutchins, Jr.
4 : compare used with against such a crime is nothing when stacked against a murder— Pete Censky

intransitive verb

: to form a stack

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Other Words from stack


stacker noun

Examples of stack in a Sentence

Noun He had arranged the letters in stacks. She took a magazine from near the top of the stack. Verb She spent the afternoon splitting and stacking firewood. She stacked the plates in the cupboard. He stacked the books on the table. The other players accused him of stacking the deck.
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Recent Examples on the Web: Noun Compare that to the human genome which, at more than 3 billion letters long, is equivalent to a stack of 1,000 King James Bibles or about 725 megabytes of data. Stephen Ferguson Reprints, STAT, 28 May 2021 According to reports, the man is suspected of committing several crimes earlier in the day, including stealing a bicycle from a child and a stack of deli meat from the sandwich shop. Michael Hollan, Fox News, 23 May 2021 Flight 93 inspired a major motion picture, a Neil Young song and stack of books. Marc Levy, Star Tribune, 10 May 2021 This year, a stack of 30 such warnings sits on his desk in Orlando, Fla., alerting him that things as diverse as lumber, drywall, aluminum and steel are going to cost 10 to 20 percent more. New York Times, 3 May 2021 Shawna looks through a stack of mail hoping for her stimulus check last month. Washington Post, 15 Apr. 2021 Boxes of jerseys were next to stuffed shoeboxes with unopened sneakers almost cast a shadow on a stack of uncut trading cards. Michael Casagrande |, al, 12 Apr. 2021 Pointing to a stack of lawsuits — no matter how viable — would be one way for the utility to highlight its seriousness. Diego Mendoza-moyers, San Antonio Express-News, 11 Apr. 2021 If wondering what’s for dinner has become your new nightly routine—leading to an hour of indecision at the grocery store or flipping through a stack of takeout menus—it’s time to make a change. Erica Puisis, Forbes, 24 Feb. 2021 Recent Examples on the Web: Verb Negotiations continue on Capitol Hill over creating an outside commission, but a proposal from Pelosi that would stack the body with Democratic appointees has encountered strong GOP opposition. Author: Mike Debonis, Jeremy Barr, Anchorage Daily News, 1 Mar. 2021 Democratic presidents traditionally work their union magic through the National Labor Relations Board, via rulings that stack the deck for labor. Kimberley A. Strassel, WSJ, 20 May 2021 Osler said the guidelines clearly state that any federal sentence would be served at the same time as a state sentence—the sentences wouldn’t stack. Time, 7 May 2021 Osler said the guidelines clearly state that any federal sentence would be served at the same time as a state sentence — the sentences wouldn’t stack. Amy Forliti, Anchorage Daily News, 7 May 2021 Osler said the guidelines clearly state that any federal sentence would be served at the same time as a state sentence — the sentences wouldn’t stack. Amy Forliti And Michael Balsamo,, 7 May 2021 Doorstead has rebuilt the operations stack leveraging gig workers, central operations, and support operations. Nav Athwal, Forbes, 28 Apr. 2021 Rather than stack a string of left-handed hitters in the middle of the lineup, Woodward went with right-handed hitting Nick Solak in the No. 4 spot, breaking up what could have been five consecutive left-handed hitters. Evan Grant, Dallas News, 1 Apr. 2021 The few offers that actually could stack players didn’t appeal to Cleveland because of the crippling contracts potentially going back. Chris Fedor, cleveland, 27 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'stack.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of stack


14th century, in the meaning defined at sense 1


14th century, in the meaning defined at transitive sense 1a

History and Etymology for stack


Middle English stak, from Old Norse stakkr; akin to Russian stog stack and probably to Old English staca stake

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Learn More About stack

Time Traveler for stack

Time Traveler

The first known use of stack was in the 14th century

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Statistics for stack

Last Updated

15 Jun 2021

Cite this Entry

“Stack.” Dictionary, Merriam-Webster, Accessed 17 Jun. 2021.

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More Definitions for stack



English Language Learners Definition of stack

 (Entry 1 of 2)

: a usually neat pile : a group of things that are put one on top of the other
: a large amount of something
: a tall chimney on a factory, ship, etc., for carrying smoke away



English Language Learners Definition of stack (Entry 2 of 2)

: to arrange (things) in a stack : to put (things) in a usually neat pile
: to cheat at a card game by arranging (a deck of cards) in a special way
used to describe a situation in which one person, team, etc., is given an advantage over others often in a way that is unfair


\ ˈstak How to pronounce stack (audio) \

Kids Definition of stack

 (Entry 1 of 2)

1 : a neat pile of objects usually one on top of the other
2 : a large number or amount We've got a stack of bills to pay.
3 : a large pile (as of hay) usually shaped like a cone
5 : a structure with shelves for storing books


stacked; stacking

Kids Definition of stack (Entry 2 of 2)

: to arrange in or form a neat pile

More from Merriam-Webster on stack

Thesaurus: All synonyms and antonyms for stack

Nglish: Translation of stack for Spanish Speakers

Britannica English: Translation of stack for Arabic Speakers


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