The rising of a submerged body above the surface of water;
a. The process of issuing from concealment, confinement, etc.; b.Astron.
The arising, sudden or unexpected occurrence (of a state of things, an event, etc.). Obs.
4. concr.a. (the ordinary mod. use): A juncture that arises or ‘turns up’; esp. a state of things unexpectedly arising, and urgently demanding immediate action.