Dictionary
cat•walk
Pronunciation: (kat'wôk"), [key]—
n.
a narrow walkway, esp. one high above the surrounding area, used to provide access or allow workers to stand or move, as over the stage in a theater, outside the roadway of a bridge, along the top of a railroad car, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.