A small mound of earth created by a mole's burrowing underneath the surface of the ground.
A hole burrowed by a worm.
A location in a monitor program containing the address of a routine, allowing the user to substitute different functionality.
A hypothetical shortcut between two points in spacetime, permitting faster-than-light travel and sometimes time travel.
To make porous or permeable through the formation of small holes or tunnels.