Did you know?

Click any word in a definition or example to find the entry for that word

stack - definition and synonyms


What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.



The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

verb [transitive] stack pronunciation in British English /stæk/
Word Forms
present tense
present participlestacking
past tensestacked
past participlestacked
  • Facebook
  • Twitter
  1. 1



    stack up

    to arrange things so that they are placed one on top of another
    She began stacking plates on the trolley.
    1. a.
      to fill a machine or space by putting things in it on top of each other
      He got a job stacking shelves at the supermarket.
      They went down to a small yard stacked high with rubbish.
  2. 2



    stack up

    to put things so that they are standing one beside another
    She was examining the paintings stacked against the wall.

phrasal verbs


a meal served in the evening which consists of foods traditionally eaten at breakfast

BuzzWord Article

Open Dictionary

troll factory

a company that pays its employees to write online comments in favour or against somebody or something posing as ordinary Internet users

add a word


A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog