1
: a sudden outburst or intensification
a flare-up of hostilities
2
: a sudden bursting (as of a smoldering fire) into flame or light
a danger of flare-ups
3
: a sudden appearance or worsening of the symptoms of a disease or condition
an asthmatic flare-up
Examples of flare-up in a Sentence
took medication to prevent a flare-up of her asthma
there's no need for an angry flare-up, as we'll take care of the problem immediately
Recent Examples on the Web
For many, the journey from diagnosis to disease management is marked by navigating sudden lifestyle adjustments, grappling with self-image shifts, and finding ways to cope with the unpredictability of flare-ups.
—
Chloe Castleberry, Flow Space, 25 July 2025
The recent flare-up came after five Thai soldiers were wounded in a landmine explosion on Wednesday.
—Kocha Olarn, CNN Money, 25 July 2025
Following the flare-up in May, both countries took retaliatory actions, with Thailand stopping nearly all border crossings before ultimately closing them entirely.
—Rachel Wolf, FOXNews.com, 24 July 2025
And Vakil said future flare-ups of violence felt inevitable.
—Chantal Da Silva, NBC news, 17 July 2025
See All Example Sentences for flare-up
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Chloe Castleberry, Flow Space, 25 July 2025
The recent flare-up came after five Thai soldiers were wounded in a landmine explosion on Wednesday.
—Kocha Olarn, CNN Money, 25 July 2025
Following the flare-up in May, both countries took retaliatory actions, with Thailand stopping nearly all border crossings before ultimately closing them entirely.
—Rachel Wolf, FOXNews.com, 24 July 2025
And Vakil said future flare-ups of violence felt inevitable.
—Chantal Da Silva, NBC news, 17 July 2025
See All Example Sentences for flare-up
Cite this Entry
“Flare-up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flare-up. Accessed 2 Aug. 2025.
Copy CitationMedical Definition
flare-up
noun
: a sudden appearance or worsening of the symptoms of a disease or condition
an asthmatic flare-up
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