oystercatcher Syllabification: (oys·ter·catch·er)Pronunciation: /ˈoistərˌkaCHər/Definition of oystercatcher noun a coastal wading bird with black-and-white or all-black plumage and a strong orange-red bill, feeding chiefly on shellfish. Family Haematopodidae and genus Haematopus: several species, e.g., the black and white H. ostralegus of Eurasia oystercatcher in other Oxford dictionaries Definition of oystercatcher in the British & World English dictionary