D defs.my
Entry 4 senses Webster, 1913

Socket

/säk'-ət/ · Sock·et · IPA /ˈsɑkɪt/
01 n. An opening into which anything is fitted; any hollow thing or place which receives and holds something else; as, the sockets of the teeth.
  1. 1.
    An opening into which anything is fitted; any hollow thing or place which receives and holds something else; as, the sockets of the teeth.
    “His eyeballs in their hollow sockets sink.” Dryden.
  2. 2.
    Especially, the hollow tube or place in which a candle is fixed in the candlestick.
  3. 3.
    the receptacle of an electric lamp into which a light bulb is inserted, containing contacts to conduct electricity to the bulb.(Electricity)
  4. 4.
    the receptacle fixed in a wall and connected by conductive wiring to an electrical supply, containing contacts to conduct electricity, and into which the plug of an electrical device is inserted; -- called also a wall socket or outlet. The socket will typically have two or three contacts; if three, the third is connected to a ground for safety.(Electricity) Also: wall socket, outlet
    “And in the sockets oily bubbles dance.” Dryden.
Phrases & compounds
Socket bolt — a bolt that passes through a thimble that is placed between the parts connected by the bolt.
Socket chisel — Same as Framing chisel. See under Framing.
Socket pipe — a pipe with an expansion at one end to receive the end of a connecting pipe.
Socket pole — a pole armed with iron fixed on by means of a socket, and used to propel boats, etc.
Socket wrench — a wrench consisting of a socket at the end of a shank or rod, for turning a nut, bolthead, etc., in a narrow or deep recess.