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  • flare-up
    flare-up
    noun
    a sudden burst of fire or light
  • flare up
    flare up
    Suddenly become angry, as in She flared up at the slightest provocation. This metaphoric expression, dating from the mid-1800s, transfers a sudden burst of flame to sudden rage.
Synonyms

flare-up

British  

noun

  1. a sudden burst of fire or light

  2. informal a sudden burst of emotion or violence

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. to burst suddenly into fire or light

  2. informal to burst into anger

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
flare up Idioms  
  1. Suddenly become angry, as in She flared up at the slightest provocation. This metaphoric expression, dating from the mid-1800s, transfers a sudden burst of flame to sudden rage.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Given this flare-up in fighting, reporters asked if there would be an end to this war.

From Salon Sep. 14, 2026

Meanwhile, left tackle Rashawn Slater, who missed all of last season after sustaining a knee injury in training camp, was sidelined for much of August because of a flare-up to that same knee.

From Los Angeles Times Sep. 6, 2026

Stocks fell and bond yields held at multi-decade highs as investors ramp up rate hike bets amid a fresh flare-up in Middle East tensions that has sparked another surge in oil prices.

From Barron's Sep. 2, 2026

A co-ordinated international naval response together with private security on commercial ships successfully drove down the scourge and contained a flare-up in 2023 and 2024.

From BBC Aug. 29, 2026

The lawyer’s sally induced guffaws, a courtroom flare-up that Judge Tate’s dour gaze soon extinguished.

From "In Cold Blood" by Truman Capote

California’s struggling wine industry says it expects to take another hit as trade tensions between the U.S. and Canada flare up again.

From Los Angeles Times Aug. 26, 2026

"At first glance, it may seem under control, but it can flare up again because it re-emerges, sometimes from great depths," explained regional government spokesperson Stephanie Ernoux.

From Barron's Aug. 19, 2026

Katie described how Yann would "flare up" if he was in a room with any of his allergens.

From BBC Jun. 13, 2026

While the possibility remains that hostilities could flare up again in the Persian Gulf, Haefele is adamant that gradual de-escalation is ongoing, citing President President Trump’s assertion that a cease fire is still in effect.

From MarketWatch May 8, 2026

Some streets away from the square, I see a blaze flare up.

From "Catching Fire" by Suzanne Collins

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