Meaning of BURN UP in English

BURN UP

1.

If something burns up or if fire burns it up, it is completely destroyed by fire or strong heat.

The satellite re-entered the atmosphere and burned up...

Fires have burned up 180,000 acres of timber.

PHRASAL VERB: V P, V P n (not pron), also V n P

2.

If something burns up fuel or energy, it uses it.

Brisk walking burns up more calories than slow jogging.

PHRASAL VERB: V P n (not pron), also V n P

Collins COBUILD.      Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) .