passageway

noun2

1. •
   A covered walkway, between rooms or buildings.

   • The door of the twins' room opposite was open; a twenty-watt night-light threw a weak yellow glow into the passageway. David could hear the twins breathing in time with each other. — 1994
2. •
   Any way for passing in, out or through something.

   • The units have transverse seats, two and three astride the passageway with single or double longitudinal seats alongside the two entrance vestibules in each car. — 1960