Smart answer:

Your search for What is a black hole returned the following results:

an area in space with an incredibly strong gravity

A black hole is an area in space with an incredibly strong gravity.

Source:

a geometrically defined region of spacetime exhibiting such strong gravitational effects that nothing—including particles and electromagnetic radiation such as light—can escape from inside light

A black hole is a geometrically defined region of spacetime exhibiting such strong gravitational effects that nothing—including particles and electromagnetic radiation such as light—can escape from inside light.

Source:

a region of spacetime where gravity is so relentless that nothing nearby – not stars, not even light – can resist not even light's pull

A black hole is a region of spacetime where gravity is so relentless that nothing nearby – not stars, not even light – can resist not even light's pull.

a region of spacetime from which nothing, not even light, can escape

A black hole is a region of spacetime from which nothing, not even light, can escape.

where gravity prevents anything, including light, from escaping

A black hole is a region of space time where gravity prevents anything, including light, from escaping.

Source:

an object so massive and dense that nothing, not even light, can escape not even light's gravitational pull

A black hole, according to general relativity, is an object so massive and dense that nothing, not even light, can escape not even light's gravitational pull.

Source:

a dense, compact region of space with a gravitational field so intense that neither matter nor light can escape and the last meal that the super massive black hole of the Milky Way had was six million years ago

A black hole is a dense, compact region of space with a gravitational field so intense that neither matter nor light can escape and the last meal that the super massive black hole of the Milky Way had was six million years ago.

a region in space with extremely strong gravitational pull

A black hole is a region in space with extremely strong gravitational pull.

a region in space

According to NASA a black hole is a region in space where the pulling force of gravity is so strong that light is not able to escape.

a region in space where the force of gravity is so strong not even light – the fastest known entity in our universe

A black hole is a region in space where the force of gravity is so strong not even light – the fastest known entity in our universe – can escape.

a region of spacetime that is extremely warped

A black hole is a region of spacetime that is extremely warped.

Source:

a region in space where gravity is so strong that nothing escapes him,

A black hole is a region in space where gravity is so strong that nothing escapes him, not even light.