Definitions
1.nounA flexible sac that can expand and contract and that holds liquids or gases.
2.nounSpecifically, the urinary bladder.
3.nounA hollow, inflatable organ of a plant.
4.nounThe inflatable bag inside various balls used in sports, such as footballs and rugby balls.
5.nounA sealed plastic bag that contains wine and is usually packaged in a cask.
6.nounAnything inflated, empty, or unsound.