definition of
[burn up]

[1] #1 burn up v. burn brightly; "Every star seemed to flare with new intensity". wn

[2] #2 burn up v. use up (energy); "burn off calories through vigorous exercise". wn

[3] #3 burn up v. burn completely; be consumed or destroyed by fire; "The hut burned down"; "The mountain of paper went up in flames". wn