A bag or sac in animals, which serves as the receptacle of
some fluid; as, the urinary bladder; the gall bladder; – applied
especially to the urinary bladder, either within the animal, or when
taken out and inflated with air.

Any vesicle or blister, especially if filled with air, or
a thin, watery fluid.

A distended, membranaceous pericarp.

Anything inflated, empty, or unsound.

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

To put up in bladders; as, bladdered lard.