Webster 1913 Edition
[The same word as
down: cf. D.
Downa bank of sand.]
A low hill of drifting sand usually formed on the coats, but often carried far inland by the prevailing winds.
Three great rivers, the Rhine, the Meuse, and the Scheldt, had deposited their slime for ages among the
dunesor sand banks heaved up by the ocean around their mouths.
Webster 1828 Edition