7. Low land formed by alluvial deposits along a river; low-lying ground; a dale; a valley. "The bottoms and the high grounds." Stoddard.
8. (Naut.) The part of a ship which is ordinarily under water; hence, the vessel itself; a ship.
My ventures are not in one bottom trusted.
Shak.
Not to sell the teas, but to return them to London in the
same bottoms in which they were shipped.
Bancroft.
Full bottom, a hull of such shape as permits carrying a large amount of merchandise.