An opening into which anything is fitted; any hollow thing or place which receives and holds something else; as, the sockets of the teeth.
- An opening or a cavity into which an inserted part is designed to fit: a light-bulb socket.
- Anatomy The concave part of a joint that receives the end of a bone.
- Anatomy A hollow or concavity into which a part, such as the eye, fits.
- To furnish with or insert into a socket.