Definition of "stacker"

stacker

/ˈstækɚ/

noun
plural stackers
1. Any person or thing that stacks.
  Quotations
  As behavioral scientists we are not good block stackers — we don't replicate enough or build systematically across knowledge bases.
  1991, Joan H. Cantor, Charles C. Spiker, Lewis Paeff Lipsitt, Child Behavior and Development: Training for Diversity, page 168
  1. A worker who stacks the shelves in a supermarket.
  2. A participant in sport stacking.
2. Any device allowing items to be stacked.
  1. An output bin in a document feeding or punch card machine (contrast with hopper).
3. (informal) A person who collects precious metal in the form of various small objects such as coins and bars.