noun

1. An opening into which a plug or other connecting part is designed to fit (e.g. a light bulb socket).

2. A hollow into a bone which a part fits, such as an eye, or another bone, in the case of a joint.

3. One endpoint of a two-way communication link, used for interprocess communication across a network.

Synonyms: jack

verb

1. To place or fit in a socket.