en routeadverb
US also enroute uk/ˌɒn ˈruːt/us/ˌɑːn ˈruːt/on the way to or from somewhere:
I stopped en route (to the party) and got some wine.
The bomb exploded while the plane was en route from Paris to Tokyo.
en routeadjective
also enroute uk/ˌɒn ˈruːt//ˌɑːn ˈruːt/USon the way to or from somewhere:
weather-related enroute delays