noun (plural walrus or walruses) Etymology: Dutch, of Scandinavian origin; akin to Danish & Norwegian hvalros walrus, Old Norse rosmhvalr Date: 1728 a large gregarious marine mammal ( Odobenus rosmarus of the family Odobenidae) of arctic waters that is related to the seals and has long ivory tusks, a tough wrinkled hide, and stiff whiskers and that feeds mainly on bivalve mollusks
