What is the meaning of blister?

noun

• A flaw on a surface resulting when an applied substance does not adhere (as an air bubble in a coat of paint. )
• Botany) a swelling on a plant similar to that on the skin. (
• Pathology) an elevation of the skin filled with serous fluid.
  • synonyms: bulla, bleb

verb

• Get blistered.
  • usage: "Her feet blistered during the long hike"
  • synonyms: vesicate
• Subject to harsh criticism.
  • usage: "The Senator blistered the administration in his speech on Friday"; "the professor scaled the students"; "your invectives scorched the community"
  • synonyms: scald, whip
• Cause blisters to form on.
  • usage: "the tight shoes and perspiration blistered her feet"