Pronunciation

• IPA ^(key): /stæk/Category:Entries with IPA pronunciation

• Audio (AU)

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  Category:Entries with audio pronunciation

• Audio (UK)

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  Category:Entries with audio pronunciation

Noun

1. (countable)Category:Countable nouns A pile of something similar.

   There is a stack of books outside. Are those yours?

Verb

1. When you stack something, you put something similar on top of one another to form a pile.

   I stacked up the books at one side.