Meaning of BURN UP in English

BURN UP

1.

to be destroyed by heat :

The spacecraft burned up as it entered the earth's atmosphere.

2.

(usually used in the progressive tenses) ( informal ) to have a high temperature :

You're burning up—have you seen a doctor?

3.

( of a fire ) to burn more strongly and with larger flames

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.