Definition of "blister" []

• A local swelling of the skin that contains watery fluid and is caused by burning or irritation. (noun)
• A similar swelling on a plant. (noun)
• A raised bubble, as on a painted or laminated surface. (noun)
• A rounded, bulging, usually transparent structure, such as one used for observation on certain aircraft or for display and protection of packaged products. (noun)
• To cause a blister to form on. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Remember how Accutane came in blister packs, and the no-pregnancy symbols on the back of _every_ _single_ _blister_?"
• "I buy the Raid in blister packs of three at Costco."
• "But plastic wrapped things, shrink-wrapped items, equipment sold in blister packs or sealed in a stiff transparent plastic, those we did not have … much."