Definition of flare up phrasal verb from the Oxford Advanced American Dictionary

 

flare up

 phrasal verb
phrasal verb
 
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Phrasal Verbs
  1. 1(of flames, a fire, etc.) to suddenly start burning more brightly He put more logs on the fire and watched it flare up again. related noun flare-up
  2. 2(of a person) to suddenly become angry She flares up at the slightest provocation. related noun flare-up
  3. 3(of an illness, injury, etc.) to suddenly start again or become worse His eczema has flared up again. related noun flare-up
See the Oxford Advanced Learner's Dictionary entry: flare up

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