three-way (EN)
adjective, noun

adjective “three-way”

three-way, non-gradable
  1. something that involves three separate paths or directions
    The intersection has a three-way stop sign to manage traffic from all directions.

noun “three-way”

sg. three-way, pl. three-ways
  1. a situation where three people engage in sexual activity together
    Last night, Alex, Jamie, and Taylor decided to have a three-way.