Plug
Definition 1 of 6
Pro Tip 1/2
Physical Connection
The word 'plug' refers to the physical act of connecting something, especially in electrical contexts. He found the plug and connected the TV to the wall socket.
Pro Tip 2/2
Appliance Specific
'Plug' refers to an object, and various appliances may have plugs designed specifically for them. I need a USB plug for my phone, not a standard one.