Stack = basic method of organizing memory on a computer. Like a stack of papers, except a "stack" of numbers which you've been working with. You can push something on to the top of it, pop it off to use it, and sometimes do other things as well, like reshuffling. Forth is a stack based language (unlike, say, C which is ultimately register based).
― Sterling Clover, Wednesday, 31 October 2001 01:00 (twenty-three years ago)