burn up - definition and synonyms

phrasal verb
present tense
I/you/we/theyburn up
he/she/itburns up
present participleburning up
past tenseburned up or burnt up
past participleburned up or burnt up
  1. 1
    [intransitive/transitive] if something burns up, or if it is burned up, fire completely destroys it

    The spacecraft has a heat shield to prevent it burning up when it re-enters the Earth’s atmosphere.

  2. 2
    [transitive] same as burn off (sense 2)
  3. 3
    [transitive] if a machine or vehicle burns up fuel, it uses the fuel to work
  4. 4
    [intransitive] if someone is burning up, they are very hot, especially because they have a fever
See also main entry: burn