A stack is a tidy pile, like the stack of books on your nightstand or the stack of pancakes on your plate at breakfast. You can also use stack as a verb meaning "to arrange in piles."

If you stack the dollar bills you earned from your lemonade stand, you'll eventually have a stack of dollar bills. Unlike the similar word pile, stack implies a neat, orderly bundle, rather than a messy, haphazard one. When someone "stacks the deck," they cheat in order to achieve the outcome they want—sometimes literally, by arranging a deck of cards unfairly.

Definitions of stack

n an orderly pile

hayrick, haystack, rick
a stack of hay
a small cone-shaped pile of hay that has been left in the field until it is dry enough to carry to the hayrick
Type of:
agglomerate, cumulation, cumulus, heap, mound, pile
a collection of objects laid on top of each other

n a storage device that handles data so that the next item to be retrieved is the item most recently stored (LIFO)

push-down storage, push-down store
Type of:
memory device, storage device
a device that preserves information for retrieval

n a list in which the next item to be removed is the item most recently stored (LIFO)

push-down list, push-down stack
Type of:
list, listing
a database containing an ordered array of items (names or topics)

n a large tall chimney through which combustion gases and smoke can be evacuated

(nautical) smokestack consisting of a shaft for ventilation or the passage of smoke (especially the smokestack of a ship)
Type of:
a vertical flue that provides a path through which smoke from a fire is carried away through the wall or roof of a building

n (often followed by `of') a large number or amount or extent

batch, deal, flock, good deal, great deal, hatful, heap, lot, mass, mess, mickle, mint, mountain, muckle, passel, peck, pile, plenty, pot, quite a little, raft, sight, slew, spate, tidy sum, wad
deluge, flood, inundation, torrent
an overwhelming number or amount
a mass of hay piled up in a barn for preservation
Type of:
large indefinite amount, large indefinite quantity
an indefinite quantity that is above the average in size or magnitude

v arrange in stacks

stack your books up on the shelves”
heap, pile
pile in ricks
stack in cords
Type of:
arrange, set up
put into a proper or systematic order

v load or cover with stacks

stack a truck with boxes”
Type of:
lade, laden, load, load up
fill or place a load on

v arrange the order of so as to increase one's winning chances

stack the deck of cards”
Type of:
arrange, set up
put into a proper or systematic order

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