definition of
stack

[1] #1 stack n. an orderly pile. wn

[2] #2 stack v. load or cover with stacks; "stack a truck with boxes". wn

[3] #3 stack n. [batch, deal, flock, good deal, great deal, hatful, heap, lot, mass, mess, mickle, mint, mountain, muckle, passel, peck, pile, plenty, pot, quite a little, raft, sight, slew, spate, tidy sum, wad] (often followed by 'of') a large number or amount or extent; "a batch of letters"; "a deal of trouble"; "a lot of money"; "he made a mint on the stock market"; "see the rest of the winners in our huge passel of photos"; "it must have cost plenty"; "a slew. wn

[4] #4 stack v. [pile, heap] arrange in stacks; "heap firewood around the fireplace"; "stack your books up on the shelves". wn

[5] #5 stack n. [push-down list, push-down stack] a list in which the next item to be removed is the item most recently stored (LIFO). wn