oystercatcher \oystercatcher\, oyster catcher \oyster catcher\n. (Zool.), Any one of several species of wading birds of the genus {Haematopus} having stout legs and bill and mostly black-and-white plumage, which frequent seashores and feed upon oysters and other shellfish. The European species ({Haematopus ostralegus}), the common American species ({Haematopus palliatus}), and the California, or black, oyster catcher ({Haematopus Bachmani}) are the best known. Syn: oyster plover. [1913 Webster]