Question

Define white hole...​

Answer 1

Explanation:

In general relativity, a white hole is a hypothetical region of spacetime and singularity which cannot be entered from the outside, although energy-matter, light and information can escape from it. ... White holes appear in the theory of eternal black holes.

Answer 2

Answer:

A hypothetical celestial object which expands outwards from a space–time singularity and emits energy, in the manner of a time-reversed black hole.