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Meaning of pin rail

pin' rail"

Pronunciation: [key]
  1. a rail on a fly gallery, wall, etc., holding two rows of pins or cleats for securing lines attached to scenery.
  2. a strong rail at the side of the deck of a vessel, for holding the pins to which some of the running rigging is belayed. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.