a pile of objects, typically one that is neatly arranged

a stack of boxes

a chimney, especially one on a factory, or a vertical exhaust pipe on a vehicle

a measure for a pile of wood of 108 cu. ft (3.06 cubic metres)

arrange (a number of things) in a pile, typically a neat one

she stood up, beginning to stack the plates

shuffle or arrange (a pack of cards) dishonestly so as to gain an unfair advantage

I know the cards are stacked

the law stacks the deck in favour of the insurance companies

(in snowboarding) fall over