Meaning of headrail

head•rail

Pronunciation: (hed'rāl"), [key]
— n.
  1. a railing on a sailing vessel, extending forward from abaft the bow to the back of the figurehead.
  2. Also calleda narrow, boxlike case extending across the top of a window blind and covering the mechanical devices by which the blind operates.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.