To put into a cavern.
To form a cavern or deep depression in.
A large, dark place or space.
A large cave.
An underground chamber.
To make porous or permeable through the formation of small holes or tunnels.
A location in a monitor program containing the address of a routine, allowing the user to substitute different functionality.
A hole burrowed by a worm.
A hypothetical shortcut between two points in spacetime, permitting faster-than-light travel and sometimes time travel.