What does "alley" mean?

Alley: A narrow passage or way in a city, as distinct from a public street. Gay.

Additional senses

  1. 2.A passageway between rows of pews in a church.
  2. 3.(Persp.) Any passage having the entrance represented as wider than the exit, so as to give the appearance of length.
  3. 4.The space between two rows of compositors' stands in a printing office.
  4. 5.A choice taw or marble. Dickens.

Sources