Source : Webster's Revised Unabridged Dictionary (1913)

Ashlaring \Ash"lar*ing\, Ashlering \Ash"ler*ing\, n.
   1. The act of bedding ashlar in mortar.

   2. Ashlar when in thin slabs and made to serve merely as a
      case to the body of the wall. --Brande & C.

   3. (Carp.) The short upright pieces between the floor beams
      and rafters in garrets. See {Ashlar}, 2.