noun

1. a raised patch of skin, specif. of epidermis, filled with watery matter and caused by a burn, frostbite, rubbing, etc.
2. something used or applied to cause a blister
3. anything resembling a blister, as on a plant, a coat of paint, etc.
4. a bulging, bubblelike projection, usually transparent, used for observation, protection, etc. on an aircraft, train, car, etc.
5. a transparent, rigid shell, used to package, protect, and display an article of merchandise

Etymology: ME < Du bluister or OFr blestre < ?

transitive verb

1. to cause blisters to form on
2. to beat severely
3. to lash with words

intransitive verb