Definition of stack noun from the Oxford Advanced American Dictionary

     

    stack

     noun
    noun
    NAmE//stæk//
     
     
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  1. 1[countable] a pile of something, usually neatly arranged a stack of books see also haystack
  2. 2 [countable] stack (of something) (informal) a large number or amount of something; a lot of something stacks of money There's a stack of unopened mail waiting for you at the house. I've got stacks of work to do.
  3. 3[countable] a tall chimney, especially on a factory see also chimney stack, smokestack
  4. 4the stacks [plural] the part of a library, sometimes not open to the public, where books that are not often needed are stored The books you need will have to be brought up from the stacks.
  5. 5 [countable] (computing) a way of storing information in a computer in which the most recently stored item is the first to be retrieved (= found or gotten back)
  6. 6 [countable] (geology) a tall thin part of a cliff that has been separated from the land and stands on its own in the sea
  7. Idioms
    blow your top/stack(informal)
     
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    to get very angry
See the Oxford Advanced Learner's Dictionary entry: stack