Definitions
1.NounA flat-bottomed boat or other floating structure used as a buoyant support for a temporary bridge, dock or landing stage.
2.NounA bridge with floating supports.
3.NounA box used to raise a sunken vessel.
4.NounA float of a seaplane.
5.NounA lighter or barge used for loading or unloading ships.
6.NounA card game in which the object is to obtain cards whose value adds up to, or nearly to, 21 but not exceed it.