two-way switch

English

Etymology 1

Named after its two electrical connections.

Noun

two-way switch (plural two-way switches)

1. (US, rare, electricity) A plain type of light switch that can control lights, or other electrical loads, from a single location; a single-throw switch.

Etymology 2

Named after its use in pairs to control a load from two locations.

Noun

two-way switch (plural two-way switches)

1. (British, electricity) Commonwealth spelling of (US): three-way switch.