walk-up

walk-up (not comparable)

1. (of an apartment etc) Reached by stairs rather than an elevator.
2. (of a block of apartments) Containing such flats.
3. (of a service) For which no appointment is necessary.

   Synonym: walk-in

walk-up (plural walk-ups)

1. (US) An apartment or block with stairs rather than an elevator.
   • 2010, Christopher Hitchens, Hitch-22, Atlantic 2011, p. 228:

     I became the tenant of a walk-up on East Tenth Street, on the north side of Tompkins Square, found for me by the seemingly omni-connected Ian McEwan […]

   • 2010, Jennifer Egan, “Found Objects”, in A Visit from the Goon Squad:

     They took a cab and climbed the four flights to Sasha's Lower East Side walk-up.

2. (aviation) An informal visit to a control tower by a pilot, typically used as part of pilot training.
3. A mountain that can be climbed without specialist equipment.
4. A customer who arrives without a reservation; a walk-in.
5. An indoor or outdoor stand where food is sold to the public.
6. Colaptes auratus, northern flicker.