olemus
elektrivõrgu seina-pistikupesa ("seinakontakt")
= a wall socket for connecting electric equipment

näiteid
https://duckduckgo.com/?q=wall+outlet&t=h_&iax=images&ia=images

ülevaateid
https://english.stackexchange.com/questions/42259/difference-between-socket-and-outlet

https://en.wikipedia.org/wiki/AC_power_plugs_and_sockets