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cold sore
noun
: a group of fluid-filled blisters appearing about or within the mouth that are caused by a herpes simplex virus and upon rupturing form crusts
called also fever blister
compare canker soreExamples of cold sore in a Sentence
Recent Examples on the Web
Herpes: Painful blisters around the mouth or genitals from herpes may benefit from cool compresses, cold sore creams, or lidocaine for relief.
—Susan Bard, Verywell Health, 27 Sep. 2024
In addition, McGill recommends patients who experience cold sores to take Valtrex in advance of treatments.
—Emily Burns, WWD, 26 Sep. 2024
When a cold sore develops, the lesions are highly infectious.
—Beth Mole, Ars Technica, 5 Sep. 2024
In her two years of life she’s spent quite a bit of time at the vet, for eye infections and painful cold sores, among other things.
—Deborah Vankin, Los Angeles Times, 14 Aug. 2024
See all Example Sentences for cold sore
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Word History
First Known Use
1870, in the meaning defined above
Dictionary Entries Near cold sore
Cite this Entry
“Cold sore.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cold%20sore. Accessed 5 Nov. 2024.
Kids Definition
cold sore
noun
: a group of blisters about or within the mouth caused by a herpes virus
called also fever blister
Medical Definition
cold sore
noun
: a vesicular lesion that typically occurs in or around the mouth, that initially causes pain, burning, or itching before bursting and crusting over, and that is caused by a herpes simplex virus which remains dormant in the body and may be reactivated by a variety of factors (as stress, fever, or sunburn)
called also fever blister
compare canker soreMore from Merriam-Webster on cold sore
Britannica.com: Encyclopedia article about cold sore
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