American English

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

 

burn up

 phrasal verb
phrasal verb
 
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Phrasal Verbs
  1. 1to be destroyed by heat The spacecraft burned up as it entered the earth's atmosphere.
  2. 2 (usually used in the progressive tenses) (informal) to have a high temperature You're burning up—have you gone to the doctor yet?
  3. 3(of a fire) to burn more strongly and with larger flames

burn somebody up

(informal)
 
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to make someone very angry The way he treats me really burns me up.

    burn somethingup

     
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  1. 1 to get rid of or destroy something by burning The fire burned up 1,500 acres of farmland.
  2. 2to use calories or energy by doing exercise Which burns up more calories—swimming or cycling?
See the Oxford Advanced Learner's Dictionary entry: burn up