What is the meaning of Bladder?

A flexible sac that can expand and contract and that holds liquids or gases.

Specifically, the urinary bladder.

A hollow, inflatable organ of a plant.

The inflatable bag inside various balls used in sports, such as footballs and rugby balls.

A container in the form of a flexible bag.

A sealed plastic bag that contains wine and is usually packaged in a cask.

Anything inflated, empty, or unsound.

To swell out like a bladder with air; to inflate.

To store or put up in bladders.

blister, particularly of paint

alternative form of bladdre

Source: wiktionary.org