Definition of: blister

(blis′tər) noun
1. A thin vesicle, especially one on the skin, containing watery matter, as from a scald, bruise, etc.
2 A similar vesicle on a plant, on steel, or on a painted surface.
3. Any substance used for blistering.
4. Nav. A bulge on the hull of a warship below the waterline to protect it from torpedoes.
5. Aeron. A bulge or projection from the fuselage of certain aircraft, containing guns and used for observation.
—v.t.
1. To produce a blister or blisters upon.
2. To rebuke; lash with words.
—v.i.
3. To become blistered. [OF blestre <ON blāstr swelling]