n.
  - a long passage from which doors lead into rooms. 
▸Brit. a passage along the side of a railway carriage giving access to compartments.
 - a belt of land linking two other areas or following a road or river.
 
 
  Phrase
  
    
      - the corridors of power
 the senior levels of government or administration. 
    
   
  Etymology
  C16: from Fr., from Ital. corridore, alt. (by assoc. with corridore ‘runner’) of corridoio ‘running-place’, from correre ‘to run’, from L. currere.