1876  The river . . . in 1810, was again closed by a good dyke, with substantial sluices. . . .
1889  With remarkable industry the Acadians reclaimed from the sea by dikes many thousands of fertile acres . . . and on the sea meadows, at one time, grazed as many as sixty thousand head of cattle.
2n. the fertile sea meadows protected by a dike (def. 1).