Definition of sockets:
(n) :
(electricity) An opening into which a plug or other connecting part is designed to fit (e.g. a light bulb socket).
(n) :
Any of various concave objects (or portions of larger objects) that envelop a counterpart object.
(n) :
(anatomy) A hollow into a bone which a part fits, such as an eye, or another bone, in the case of a joint.
(n) :
(computing) One endpoint of a two-way communication link, used for interprocess communication across a network.
(n) :
(computing) One endpoint of a two-way named pipe on Unix and Unix-like systems, used for interprocess communication.
(n) :
The socket head for a socket wrench.