#1 blow up v. cause to burst with a violent release of energy; "We exploded the nuclear bomb". wn #2 blow up v. make large; "blow up an image". wn #3 blow up v. get very angry and fly into a rage; "The professor combusted when the student didn't know the answer to a very elementary question"; "Spam makes me go ballistic". wn #4 blow up v. add details to. wn #5 blow up v. burst and release energy as through a violent chemical or physical reaction;"the bomb detonated at noon"; "The Molotov cocktail exploded". wn