cave

A large, naturally-occurring cavity formed underground or in the face of a cliff or a hillside.

We found a cave on the mountainside where we could take shelter.

The preposterous altruism too![…]Resist not evil. It is an insane immolation of self—as bad intrinsically as fakirs stabbing themselves or anchorites warping their spines in caves scarcely large enough for a fair-sized dog.

A hole, depression, or gap in earth or rock, whether natural or man-made.

Every boy at one time or another has dug a cave; I suppose because ages and ages ago his ancestors had to live in caves, […]

A storage cellar, especially for wine or cheese.

This wine has been aged in our cave for thirty years.

A place of retreat, such as a man cave.

My room was a cozy cave where I could escape from my family.

A naturally-occurring cavity in bedrock which is large enough to be entered by an adult.

It was not strictly a cave, but a narrow fissure in the rock.

To surrender.

He caved under pressure.

Eventually the NUR overplayed its hands with an all-out strike. And when Peter Parker, the then-chairman of BR, who was well regarded among his staff, called their bluff by threatening to close down the entire network, they caved in.

To collapse.

First the braces buckled, then the roof began to cave, then we ran.

To hollow out or undermine.

The levee has been severely caved by the river current.

To engage in the recreational exploration of caves.

Pam has been caving for 25 years. She and her husband Tim are among the top cavers in the country. They are passionate about the world hidden beneath our feet and they were to be my instructors and guides on my first ever foray below ground that didn't involve getting on the tube.

In room-and-pillar mining, to extract a deposit of rock by breaking down a pillar which had been holding it in place.

The deposit is caved by knocking out the posts.

look out!; beware!

Ssh! Cave! Mum's the word! Not 'arf, or what?