\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.