a more or less orderly pile or heap:
a precariously balanced stack of books; a neat stack of papers.
a large, usually conical, circular, or rectangular pile of hay, straw, or the like.
Often, stacks. a set of shelves for books or other materials ranged compactly one above the other, as in a library.
stacks, the area or part of a library in which the books and other holdings are stored or kept.
a number of chimneys or flues grouped together.
a vertical duct for conveying warm air from a leader to a register on an upper story of a building.
a vertical waste pipe or vent pipe serving a number of floors.
Informal. a great quantity or number.
Radio. an antenna consisting of a number of components connected in a substantially vertical series.
Computers. a linear list arranged so that the last item stored is the first item retrieved.
Military. a conical, free-standing group of three rifles placed on their butts and hooked together with stacking swivels.
Also called air stack, stackup
a group of airplanes circling over an airport awaiting their turns to land.
an English measure for coal and wood, equal to 108 cubic feet (3 cu. m).
Geology. a column of rock isolated from a shore by the action of waves.
a given quantity of chips that can be bought at one time, as in poker or other gambling games.
the quantity of chips held by a player at a given point in a gambling game.