What is Blister?

Blister definition and meaning on Dictionary terms:
a thin vesicle on the skin, containing watery matter or serum, as from a burn or other injury.
any similar swelling, as an air bubble in a coat of paint.
a relatively large bubble occurring in glass during blowing.

Military. a transparent bulge or dome on the fuselage of an airplane, usually for mounting a gun.
Photography. a bubble of air formed where the emulsion has separated from the base of a film, as because of defective processing.
a dome or skylight on a building.
the moving bubble in a spirit level.
a small blisterlike covering of plastic, usually affixed to a piece of cardboard and containing a small item, as a pen, bolt, or medicinal tablet.

verb (used with object)
to raise a blister or blisters on: These new shoes blistered my feet.
to criticize or rebuke severely: The boss blistered his assistant in front of the whole office.

to beat or thrash; punish severely.

verb (used without object)
to form or rise as a blister or blisters; become blistered.