the.com/black hole

means A region of space where matter has collapsed so densely that its gravity prevents anything, including light, from escaping past a boundary called the event horizon.

from The astrophysics is older, but the name was popularized in the late 1960s, often credited to physicist John Wheeler, who helped make it stick as the catchy public label for these collapsed stars. Before that, scientists used clunkier phrases like 'gravitationally completely collapsed object.' The term borrows the everyday image of a black hole — a void that swallows anything that falls in — which turned out to be exactly the right metaphor for an object dark by physical necessity, not just appearance.