What is a terrine?

A terrine is a glazed earthenware cooking dish with vertical sides and a tightly fitting lid, generally oblong or oval. Modern versions are also made of enamelled cast-iron.

By extension, the term also refers to food prepared in a terrine, mainly game and venison, brawn and pâtés, and served in it. If it has been pressed and chilled, then turned out for serving in slices, a terrine becomes a pâté