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English definition of “stack”

stack

noun [C] uk   /stæk/ us  

stack noun [C] (PILE)

a pile of things arranged one on top of another: He chose a cartoon from the stack of DVDs on the shelf. informal a large amount: Don't worry, we've got stacks of time. the stacks a set of shelves in a library that are positioned close together so that a lot of books can be stored on them

stack noun [C] (ACCIDENT)

Australian English informal a car accident, especially one that causes damage

stack

verb [T] uk   /stæk/ us  
to arrange things in an ordered pile: Once the last few people had left the hall, the caretaker began stacking (up) the chairs.
Phrasal verbs
(Definition of stack from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of stack?
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