I . v. n.
1.
Break open ( from internal pressure ), fly open, be rent asunder, explode, blow up, split, split open, crack.
2.
Break ( out or forth or upon ) suddenly.
II . v. a.
Rend asunder, break open, split apart.
III . n.
1.
Explosion. See ~ing .
2.
Sudden rush, outpouring, gust, breaking forth.