Meaning of gallet

gal•let

Pronunciation: (gal'it), [key]
— Masonry. Masonry.
—n.
  1. spall (def. 1).
—v.t.
  1. to fill (a mortar joint) with gallets.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.