D defs.my
Entry 2 senses Webster, 1913

catwalk

· IPA /kˈætwˌɑk/
01 n. A narrow walkway projecting from a stage into the seating area of a theater; it is used, e. g. by models displaying clothes on it at a fash…
  1. 1.
    A narrow walkway projecting from a stage into the seating area of a theater; it is used, e. g. by models displaying clothes on it at a fashion show. Called also runway. Also: runway
  2. 2.
    A narrow walkway high in the air to allow workers access to parts of a structure otherwise difficult to reach. Catwalks are located, e.g. above a stage in a theater, between parts of a building, along the side of a bridge, on the outside of a railroad car, on the outside of a large storage tank, etc.