Definitions
1.nounA cetacean, Delphinapterus leucas, found in the Arctic Ocean.
2.nounAn obsession; monomania.
3.noun(trading cards) A printing plate used to manufacture a particular sports card, that is then issued as a collectible itself.
4.nounA person who routinely spends very large amounts of money on gambling, investments, or premium content for video games etc.