A tunnel or hole, often as dug by a small creature.
A heap or heaps of rubbish or refuse.
(with adverbial of direction) to move underneath or press up against in search of safety or comfort
(with into) to investigate thoroughly
to dig a tunnel or hole
A machine that can bore a tunnel underground
A perforating artery or vein
A tool or machine that makes holes, or perforates, materials such as paper and card.