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stack

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verb [transitive] stack pronunciation in American English /stæk/ 
Word Forms
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present tense
I/you/we/theystack
he/she/itstacks
present participlestacking
past tensestacked
past participlestacked
  1. 1

    stack

    or

    stack up

    to arrange things so that they are placed one on top of another

    She began stacking dishes on the serving cart.

    Cardboard boxes were stacked ceiling high.

    1. a.
      to fill a machine or space by putting things in it on top of each other

      They went down to a small yard stacked high with garbage.

      Synonyms and related words for this sense of stack
      Synonyms and related words for this sense of stack
  2. 2

    stack

    or

    stack up

    to put things so that they are standing one beside another

    She was examining the paintings stacked against the wall.

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