0 past simple and past participle of explode
1 to break up into pieces violently, or to cause something to do this:
2 to react suddenly with a strong expression of emotion:
[ + speech ] "What on earth do you think you're doing?" she exploded (= said angrily).
The children exploded into giggles (= suddenly started laughing uncontrollably).
The population has exploded in the last ten years.
4 to show something to be wrong:
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.