Wiktionary
n. (context astrophysics English) An as yet theoretical gravitational singularity with no event horizon, making it observable, unlike a black hole whose event horizon prevents light from reaching an observer situated outside the event horizon.
Wikipedia
In general relativity, a naked singularity is a gravitational singularity without an event horizon. In a black hole, the singularity is completely enclosed by a boundary known as the event horizon, inside which the gravitational force of the singularity is so strong that light cannot escape. Hence, objects inside the event horizon—including the singularity itself—cannot be directly observed. A naked singularity, by contrast, is observable from the outside.
The theoretical existence of naked singularities is important because their existence would mean that it would be possible to observe the collapse of an object to infinite density. It would also cause foundational problems for general relativity, because general relativity cannot make predictions about the future evolution of space-time near a singularity. In generic black holes, this is not a problem, as an outside viewer cannot observe the space-time within the event horizon.
Some research has suggested that if loop quantum gravity is correct, then naked singularities could exist in nature, implying that the cosmic censorship hypothesis does not hold. Numerical calculations and some other arguments have also hinted at this possibility.
No naked singularities have been identified.
Usage examples of "naked singularity".
Listen, you scared us all to death when we thought you were just trying to create a naked singularity.
Or maybe this isn't a black hole and I'm headed toward a naked singularity.
That's right, Jeanie, I had a naked singularity, sitting there in equilibrium in Section Seven.
Between the two plates appeared a naked singularity, wherein the familiar laws of physics no longer held.
She was no more than a day or two older than when she went into the naked singularity.
It is a whole infinite space that is one limitless naked singularity.
Even if once in a while it meant spending six weeks staring down into a naked singularity.