Hole

An opening or hollow space in a solid object.

opening cavity

A hole is an opening or hollow space in a solid object, surface, or substance. It can occur naturally or be created intentionally for various purposes such as drainage, storage, passage, or structural support.

The word 'hole' comes from the Old English 'hol,' meaning a hollow or cavity.

A hole is like a missing piece in something, leaving an empty space where there used to be solid stuff - think of a hole in your sock!

The Earth has a hole in its ozone layer, which protects us from the sun's harmful rays
Black holes are regions of spacetime with gravity so strong that nothing, not even light, can escape
A 'wormhole' is a theoretical tunnel connecting two distant points in spacetime

What is a hole? An opening or hollow space in a solid object
Can holes be different shapes? Yes, they can be round, square, or any other shape
What causes holes? Holes can be made by drilling, cutting, or erosion

cavity opening

pit tunnel borehole

object surface

natural feature physical entity structural element