Definitions
1.nounAn opening into which a plug or other connecting part is designed to fit (e.g. a light bulb socket).
2.nounA hollow into a bone which a part fits, such as an eye, or another bone, in the case of a joint.
3.nounOne endpoint of a two-way communication link, used for interprocess communication across a network.
4.nounOne endpoint of a two-way named pipe on Unix and Unix-like systems, used for interprocess communication.
5.nounA hollow tool for grasping and lifting tools dropped in a well-boring.
6.nounThe hollow of a candlestick.
7.nounA steel apparatus attached to a saddle to protect the thighs and legs.