three-way switch

== English == === Etymology === Named after its three electrical connections, as opposed to the two connections of a normal light switch. === Noun === three-way switch (plural three-way switches) (US, electricity) A type of light switch that can be arranged in pairs to control lights from two locations, as at either end of a stairway or long hallway; a double-throw switch. (British): two-way switch. ==== Translations ====