/ ˈsɒkɪt; NAmE ˈsɑːkɪt/ noun
1.
(also ˈpower point ) (both BrE ) ( NAmE out·let , re·cep·tacle ) a device in a wall that you put a plug into in order to connect electrical equipment to the power supply of a building :
a wall socket
2.
a device on a piece of electrical equipment that you can fix a plug, a light bulb , etc. into :
an aerial socket on the television
3.
a curved hollow space in the surface of sth that another part fits into or moves around in :
His eyes bulged in their sockets.
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WORD ORIGIN
Middle English (in the sense head of a spear, resembling a ploughshare ): from an Anglo-Norman French diminutive of Old French soc ploughshare, probably of Celtic origin.