2.NounA Y-shaped object: a wye level, wye-connected. Especially a Y-shaped connection of three sections of road or railroad track.
"A wye is used to split a single line [hose or cable] into two lines.; By going around the wye, a train can change direction."
3.VerbTo make something into a wye (letter Y) shape.
"When a hose line is divided into two or more lines, these lines are known as wyed lines."
4.VerbTo reverse the direction of a train using a wye.
"Since the train didn't have a control cab at the other end, they wyed the train to turn it around for the trip back to the city.; Committee contend that when these trains are wyed at Springfield, the road passenger crews are performing yard work at that point to eliminate switching by yard crews."